1
|
López C, Abia C, Gainza J, Rodrigues JE, Martinelli B, Serrano-Sánchez F, Silva RS, Ferrer MM, Dura OJ, Martínez JL, Fernández-Díaz MT, Alonso JA. Unveiling the Structural Properties, Optical Behavior, and Thermoelectric Performance of 2D CsSn 2Br 5 Halide Obtained by Mechanochemistry. Inorg Chem 2024; 63:12641-12650. [PMID: 38920333 PMCID: PMC11234366 DOI: 10.1021/acs.inorgchem.4c01861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/12/2024] [Accepted: 06/18/2024] [Indexed: 06/27/2024]
Abstract
Metal halide perovskites with a two-dimensional structure are utilized in photovoltaics and optoelectronics. High-crystallinity CsSn2Br5 specimens have been synthesized via ball milling. Differential scanning calorimetry curves show melting at 553 K (endothermic) and recrystallization at 516 K (exothermic). Structural analysis using synchrotron X-ray diffraction data, collected from 100 to 373 K, allows for the determination of Debye model parameters. This analysis provides insights into the relative Cs-Br and Sn-Br chemical bonds within the tetragonal structure (space group: I4/mcm), which remains stable throughout the temperature range studied. Combined with neutron data, X-N techniques permit the identification of the Sn2+ lone electron pair (5s2) in the two-dimensional framework, occupying empty space opposite to the four Sn-Br bonds of the pyramidal [SnBr4] coordination polyhedra. Additionally, diffuse reflectance UV-vis spectroscopy unveils an indirect optical gap of approximately ∼3.3 eV, aligning with the calculated value from the B3LYP-DFT method (∼3.2 eV). The material exhibits a positive Seebeck coefficient as high as 6.5 × 104 μV K-1 at 350 K, which evolves down to negative values of -3.0 × 103 μV K-1 at 550 K, surpassing values reported for other halide perovskites. Notably, the thermal conductivity remains exceptionally low, between 0.32 and 0.25 W m-1 K-1.
Collapse
Affiliation(s)
- Carlos
Alberto López
- Instituto
de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
- INTEQUI,
(UNSL-CONICET) and Facultad de Química, Bioquímica y
Farmacia, UNSL, Almirante
Brown 1455, 5700 San Luis, Argentina
| | - Carmen Abia
- Instituto
de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
- Institut
Laue Langevin, 38042 Grenoble, Cedex, France
| | - Javier Gainza
- European Synchrotron
Radiation Facility (ESRF), 71 Avenue des Martyrs, 38000 Grenoble, France
| | - João Elias Rodrigues
- CELLS−ALBA
Synchrotron Light Facility, Cerdanyola del Valles, Barcelona E-08290, Spain
| | - Brenda Martinelli
- CCAF, PPGCEM/CDTec, Federal University of Pelotas, 96010-610 Pelotas, Rio Grande do Sul, Brazil
| | | | - Romualdo Santos Silva
- Instituto
de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Mateus M. Ferrer
- CCAF, PPGCEM/CDTec, Federal University of Pelotas, 96010-610 Pelotas, Rio Grande do Sul, Brazil
| | - Oscar J. Dura
- Departamento
de Física Aplicada, Universidad de
Castilla-La Mancha, Ciudad
Real E-13071, Spain
| | - José Luis Martínez
- Instituto
de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
| | | | - José Antonio Alonso
- Instituto
de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
| |
Collapse
|
2
|
Li S, Wang F, Dong S, Dou H, Wang T, Wang HE. Sizeable square CsPb 2Br 5 nanosheets for photodetection. Chem Commun (Camb) 2024; 60:4679-4682. [PMID: 38591727 DOI: 10.1039/d4cc00338a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
All-inorganic perovskites have garnered significant attention in optoelectronics. Herein, square CsPb2Br5 nanosheets, with lateral dimensions of up to 200 μm and a thickness of less than 50 nm, were successfully synthesized via a straightforward aqueous method using HBr as a morphology-tailoring agent. A photodetector composed of a single nanosheet was subsequently fabricated and exhibited remarkable photodetection capabilities, demonstrating a detectivity of 5.98 × 109 Jones. These findings offer new perspectives on the synthesis and utilization of CsPb2Br5 and other perovskite nanostructures in optoelectronic devices.
Collapse
Affiliation(s)
- Shuang Li
- College of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
| | - Fenyun Wang
- College of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
| | - Shunhong Dong
- College of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
| | - Haoyun Dou
- College of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
| | - Tingfeng Wang
- College of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
| | - Hong-En Wang
- College of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
- Yunnan Key Laboratory of Optoelectronic Information Technology, Yunnan Normal University, Kunming 650500, China.
| |
Collapse
|
3
|
Zhao G, Sun X, Li S, Zheng J, Liu J, Huang M. Water-stable perovskite CsPb 2Br 5/CdSe quantum dot-based photoelectrochemical sensors for the sensitive determination of dopamine. NANOSCALE 2024; 16:2621-2631. [PMID: 38226862 DOI: 10.1039/d3nr05024f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
A heterojunction of CdSe quantum dots in situ grown on the perovskite CsPb2Br5 (CsPb2Br5/CdSe) for water-stable photoelectrochemical (PEC) sensing was simply synthesized using the hot-injection method. Due to the inherent built-in electric field and the matching band structure between CsPb2Br5 and CdSe, the CsPb2Br5/CdSe p-n heterojunction demonstrates enhanced photoelectrochemical properties. Accelerated interfacial charge transfer and increased electron-hole pair separation enable hydrolysis-resistant CsPb2Br5/CdSe sensors to exhibit heightened sensitivity with an ultra-low detection limit (0.0124 μM) and a wide linear range (0.4-303.9 μM) in subsequent dopamine detection. Moreover, the CsPb2Br5/CdSe sensors show excellent anti-interference ability, as well as remarkable stability and reproducibility in water solvent. It is noteworthy that this work is conducted in an aqueous environment, which provides an inspiring and convenient way for photoelectric and photoelectrocatalysis applications based on water-resistant perovskites.
Collapse
Affiliation(s)
- Gang Zhao
- Henan Joint International Research Laboratory of New Energy Materials and Devices, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Xinhang Sun
- Henan Joint International Research Laboratory of New Energy Materials and Devices, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Songyuan Li
- Henan Joint International Research Laboratory of New Energy Materials and Devices, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Jiale Zheng
- Henan Joint International Research Laboratory of New Energy Materials and Devices, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Junhui Liu
- Henan Joint International Research Laboratory of New Energy Materials and Devices, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Mingju Huang
- Henan Joint International Research Laboratory of New Energy Materials and Devices, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| |
Collapse
|
4
|
Pinheiro A, Ruivo A, Rocha J, Ferro M, Pinto JV, Deuermeier J, Mateus T, Santa A, Mendes MJ, Martins R, Gago S, Laia CAT, Águas H. Parylene-Sealed Perovskite Nanocrystals Down-Shifting Layer for Luminescent Spectral Matching in Thin Film Photovoltaics. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:210. [PMID: 36616119 PMCID: PMC9823874 DOI: 10.3390/nano13010210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/28/2022] [Accepted: 12/29/2022] [Indexed: 06/17/2023]
Abstract
The present contribution aims to enhance solar cells' performance via the development of advanced luminescent down-shifting based on encapsulated nanostructured perovskite materials. Here, thin films of inorganic lead halide (CsPbBr3) perovskite nanocrystal luminophores were synthetized, by hot-injection, deposited on glass substrates by spin-coating, and encapsulated with parylene type C, via chemical vapor deposition, to protect and stabilize the films. The optical properties of these thin films were characterized by absorption, emission and 2D contour spectra, their structure by X-ray diffraction and X-ray photoelectron spectroscopy, and the morphology by Scanning Transmission Electron microscopy. I-V curve and spectral response nanocrystalline silicon photovoltaic (nc-Si:H PV) cells were studied in the absence and presence of the perovskite and parylene luminescent down-shifting layers. The incorporation of the CsPbBr3 nanocrystals and their encapsulation with the parylene type C polymeric coating led to an increase in the current generated and the spectral response of the PV cells in the regime of the nanocrystals' fluorescence emission. A 3.1% increase in the short circuit current density and a 5.6% increase in the power conversion efficiency were observed.
Collapse
Affiliation(s)
- Ana Pinheiro
- R&D Unit VICARTE—Vidro e Cerâmica para as Artes, NOVA School of Science and Technology, Largo da Torre, 2825-516 Caparica, Portugal
- Associated Laboratory for Green Chemistry (LAQV) of the Network of Chemistry and Technology (REQUIMTE), NOVA School of Sciences and Technology, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| | - Andreia Ruivo
- R&D Unit VICARTE—Vidro e Cerâmica para as Artes, NOVA School of Science and Technology, Largo da Torre, 2825-516 Caparica, Portugal
| | - João Rocha
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Marta Ferro
- Department of Materials and Ceramic Engineering, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Joana Vaz Pinto
- CENIMAT|i3N, NOVA School of Sciences and Technology and CEMOP/UNINOVA, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| | - Jonas Deuermeier
- CENIMAT|i3N, NOVA School of Sciences and Technology and CEMOP/UNINOVA, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| | - Tiago Mateus
- CENIMAT|i3N, NOVA School of Sciences and Technology and CEMOP/UNINOVA, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| | - Ana Santa
- CENIMAT|i3N, NOVA School of Sciences and Technology and CEMOP/UNINOVA, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| | - Manuel J. Mendes
- CENIMAT|i3N, NOVA School of Sciences and Technology and CEMOP/UNINOVA, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| | - Rodrigo Martins
- CENIMAT|i3N, NOVA School of Sciences and Technology and CEMOP/UNINOVA, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| | - Sandra Gago
- Associated Laboratory for Green Chemistry (LAQV) of the Network of Chemistry and Technology (REQUIMTE), NOVA School of Sciences and Technology, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| | - César A. T. Laia
- Associated Laboratory for Green Chemistry (LAQV) of the Network of Chemistry and Technology (REQUIMTE), NOVA School of Sciences and Technology, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| | - Hugo Águas
- CENIMAT|i3N, NOVA School of Sciences and Technology and CEMOP/UNINOVA, FCT NOVA, Largo da Torre, 2825-516 Caparica, Portugal
| |
Collapse
|
5
|
Li M, Yang D, Huang X, Zhang H, Zhao Y, Yin B, Pan Q, Kang J, Zheng N, Liu X, Qiu J, Yang Z, Dong G. Coupling Localized Laser Writing and Nonlocal Recrystallization in Perovskite Crystals for Reversible Multidimensional Optical Encryption. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2201413. [PMID: 35419852 DOI: 10.1002/adma.202201413] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/11/2022] [Indexed: 06/14/2023]
Abstract
The ability to generate and manipulate photoluminescence (PL) with high spatial resolution has been of primary importance for applications in micro-optoelectronics, while the emerging metal halide perovskites offer novel material platforms where diverse photonic functionalities and fine structuring are constantly explored. Herein, micro-PL patterns consisting of highly luminescent CsPbBr3 nanocrystals (NCs) in nonluminescent perovskite crystals are directly fabricated by focused femtosecond laser irradiation. Further modulation with a moisture field leads to the selective dissolution of the laser-destabilized perovskite structures as revealed by density functional theory simulations, thus allowing for facile control of the reversible PL from the recrystallization of moisture-induced CsPbBr3 NCs. By leveraging the coupled laser writing and moisture modulation, multimodal information encryption is realized by reversible encryption-reading and repeatable erasing-refreshing. This optical storage mechanism is also extended to 3D and 4D by realizing spatially and temporally resolved optical encryption. The coupled multifield modulation on perovskite crystals can enable potential applications in optical storage and encryption, and offer a novel solution for the creation and manipulation of localized PL structures with high temporal and spatial resolutions.
Collapse
Affiliation(s)
- Mingjia Li
- State Key Laboratory of Luminescent Materials and Devices, and School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Dandan Yang
- State Key Laboratory of Luminescent Materials and Devices, and School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Xiongjian Huang
- State Key Laboratory of Luminescent Materials and Devices, and School of Physics and Optoelectronic, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Hao Zhang
- State Key Laboratory of Luminescent Materials and Devices, and School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Yifei Zhao
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Bozhao Yin
- State Key Laboratory of Luminescent Materials and Devices, and School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Qiwen Pan
- State Key Laboratory of Luminescent Materials and Devices, and School of Physics and Optoelectronic, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Juan Kang
- State Key Laboratory of Luminescent Materials and Devices, and School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Nan Zheng
- State Key Laboratory of Luminescent Materials and Devices, and School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Xiaofeng Liu
- School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, P. R. China
| | - Jianrong Qiu
- State Key Laboratory of Modern Optical Instrumentation, and College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, P. R. China
| | - Zhongmin Yang
- State Key Laboratory of Luminescent Materials and Devices, and School of Physics and Optoelectronic, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Guoping Dong
- State Key Laboratory of Luminescent Materials and Devices, and School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| |
Collapse
|
6
|
Li M, Peng S, Fang S, Gong Y, Yang D, Bu K, Liu B, Luo H, Guo S, Li J, Wang H, Liu Y, Jiang S, Lin C, Lü X. Synthesis of Two-Dimensional CsPb 2X 5 (X = Br and I) with a Stable Structure and Tunable Bandgap by CsPbX 3 Phase Separation. J Phys Chem Lett 2022; 13:2555-2562. [PMID: 35285656 DOI: 10.1021/acs.jpclett.2c00116] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Perovskite-related materials with various dimensionalities have attracted sustained attention owing to their extraordinary electronic and optoelectronic properties, but it is still challenging in the synthesis of compounds with desired compositions and structures. Herein, a two-dimensional (2D) CsPb2I5 perovskite has been synthesized by the conversion of CsPbI3 at high-pressure and high-temperature (high P-T) conditions, which is quenchable at ambient conditions. In situ synchrotron X-ray diffraction shows that high-pressure monoclinic CsPbI3 converts into tetragonal CsPb2I5 and cubic CsI at 8.7 GPa upon heating from 644 to 666 K. Keeping the tetragonal structure stable, CsPb2I5 exhibits tunable optical properties with the bandgap changing from ∼2.4 eV at ambient pressure to ∼1.4 eV at 36.9 GPa. Further experiments demonstrate similar structural evolution in the typical three-dimensional CsPbBr3 perovskite into 2D CsPb2Br5 at high P-T conditions, indicating that the conversion of CsPbX3 (X = Br and I) into CsPb2X5 is ubiquitous.
Collapse
Affiliation(s)
- Mei Li
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
| | - Shang Peng
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
| | - Shiyu Fang
- School of Materials and Engineering, Shanghai Institute of Technology, Shanghai 200235, People's Republic of China
| | - Yu Gong
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, People's Republic of China
| | - Dongliang Yang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, People's Republic of China
| | - Kejun Bu
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
| | - Bingyan Liu
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
| | - Hui Luo
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
| | - Songhao Guo
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
| | - Junlong Li
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, People's Republic of China
| | - Hao Wang
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
| | - Yufeng Liu
- School of Materials and Engineering, Shanghai Institute of Technology, Shanghai 200235, People's Republic of China
| | - Sheng Jiang
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201204, People's Republic of China
| | - Chuanlong Lin
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
| | - Xujie Lü
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, People's Republic of China
| |
Collapse
|
7
|
Liang T, Liu W, Liu X, Li Y, Fan J. Fabry-Perot Mode-Limited High-Purcell-Enhanced Spontaneous Emission from In Situ Laser-Induced CsPbBr 3 Quantum Dots in CsPb 2Br 5 Microcavities. NANO LETTERS 2022; 22:355-365. [PMID: 34941275 DOI: 10.1021/acs.nanolett.1c04025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The patterned metal halide perovskites exhibit novel photophysical properties and high performance in photonic applications. Here, we show that a UV continuous wave laser can induce in situ crystallization of individual and patterned CsPbBr3 quantum dots (QDs) inside the CsPb2Br5 microplatelets. The microplatelet acts as a natural Fabry-Perot cavity and causes the high-Purcell-effect-enhanced (by 287 times) cavity mode spontaneous emission of the embedded CsPbBr3 QDs. The luminescence exhibits a superlinear emission intensity-excitation intensity relation I(p) ∝ p2.83, and the exponent is much bigger than that of the free-space exciton spontaneous emission, suggesting arising of stimulated emission at higher photon concentrations. These laser-driven crystallized and patterned cavity mode luminescent perovskite QDs in a waterproof wider-bandgap perovskite microcavity act as an ideal platform for studying the cavity quantum electrodynamics phenomena and for applications in information storage and encryption, anticounterfeiting, and low-threshold lasers.
Collapse
Affiliation(s)
- Tianyuan Liang
- School of Physics, Southeast University, Nanjing 211189, P. R. China
| | - Wenjie Liu
- School of Physics, Southeast University, Nanjing 211189, P. R. China
| | - Xiaoyu Liu
- School of Physics, Southeast University, Nanjing 211189, P. R. China
| | - Yuanyuan Li
- School of Physics, Southeast University, Nanjing 211189, P. R. China
| | - Jiyang Fan
- School of Physics, Southeast University, Nanjing 211189, P. R. China
| |
Collapse
|
8
|
Ding L, Borjigin B, Li Y, Yang X, Wang X, Li H. Assembling an Affinal 0D CsPbBr 3/2D CsPb 2Br 5 Architecture by Synchronously In Situ Growing CsPbBr 3 QDs and CsPb 2Br 5 Nanosheets: Enhanced Activity and Reusability for Photocatalytic CO 2 Reduction. ACS APPLIED MATERIALS & INTERFACES 2021; 13:51161-51173. [PMID: 34665591 DOI: 10.1021/acsami.1c17870] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Conversion of CO2 into valuable chemical feedstocks through artificial photosynthesis is an effective strategy to alleviate energy and environmental issues. Herein, we have developed a novel perovskite-based catalyst via in situ growing CsPbBr3 quantum dots (QDs) on the affinal 2D CsPb2Br5 nanosheets for CO2 photoconversion. CsPbBr3 QDs were generated by peeling off layers from their cubic counterpart; meanwhile, CsPb2Br5 nanosheets were formed by heaping up the peeled layers. The resultant dual-phase composite exhibited outstanding activity and selectivity for photocatalytic conversion of gaseous CO2 with a CO generation rate of 197.11 μmol g-1 h-1 under 300 W Xe lamp irradiation, which is 2.5 and 1.1 times higher than that of pure CsPb2Br5 or CsPbBr3. Importantly, the fabricated dual-phase material presented extremely high stability and was able to maintain an unchangeable CO2 conversion rate under wet air in the consecutive 10 h of recycling test. Furthermore, attributing to the in situ assembling strategy, the close contact allowed photo-generated electrons in CsPbBr3 QDs to transfer rapidly to CsPb2Br5, and the affluent active sites in such an architecture enabled achieving enhanced CO2 photoconversion activity. The present work provides an attractive approach for in situ constructing a consubstantial perovskite-based composite photocatalyst to ensure great stability and excellent activity for artificial photocatalytic CO2 conversion.
Collapse
Affiliation(s)
- Lan Ding
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021 Inner Mongolia, PR China
| | - Burenbayaer Borjigin
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021 Inner Mongolia, PR China
| | - Yuning Li
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021 Inner Mongolia, PR China
| | - Xiaoxue Yang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021 Inner Mongolia, PR China
| | - Xiaojing Wang
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021 Inner Mongolia, PR China
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021 Inner Mongolia, PR China
| | - Huiqin Li
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021 Inner Mongolia, PR China
| |
Collapse
|
9
|
Xu WL, Bradley SJ, Xu Y, Zheng F, Hall CR, Ghiggino KP, Smith TA. Highly efficient radiative recombination in intrinsically zero-dimensional perovskite micro-crystals prepared by thermally-assisted solution-phase synthesis. RSC Adv 2020; 10:43579-43584. [PMID: 35519665 PMCID: PMC9058417 DOI: 10.1039/d0ra08890k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 11/23/2020] [Indexed: 12/02/2022] Open
Abstract
Zero-dimensional (0D) quantum confinement can be achieved in perovskite materials by the confinement of electron and hole states to single PbX64− perovskite octahedra. In this work, 0D perovskite (Cs4PbBr6) micro-crystals were prepared by a simple thermally-assisted solution method and thoroughly characterized. The micro-crystals show a high level of crystallinity and a high photoluminescence quantum yield of 45%. The radiative recombination coefficient of the 0D perovskite micro-crystals, 1.5 × 10−8 s−1 cm3, is two orders of magnitude higher than that of typical three-dimensional perovskite and is likely a strong contributing factor to the high emission efficiency of 0D perovskite materials. Temperature dependent luminescence measurements provide insight into the role of thermally-activated trap states. Spatially resolved measurements on single 0D perovskite micro-crystals reveal uniform photoluminescence intensity and emission decay behaviour suggesting the solution-based fabrication method yields a high-quality and homogenous single-crystal material. Such uniform emission reflects the intrinsic 0D nature of the material, which may be beneficial to device applications. 0D Cs4PbBr6 perovskite microcrystals exhibit a radiative recombination coefficient two orders of magnitude higher than typical 3D perovskite.![]()
Collapse
Affiliation(s)
- Wei-Long Xu
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia .,School of Photoelectric Engineering, Changzhou Institute of Technology Changzhou Jiangsu 213002 China
| | - Siobhan J Bradley
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Yang Xu
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Fei Zheng
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Christopher R Hall
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Kenneth P Ghiggino
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| | - Trevor A Smith
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne Parkville Victoria 3010 Australia
| |
Collapse
|
10
|
Wang R, Li Z, Li S, Wang P, Xiu J, Wei G, Liu H, Jiang N, Liu Y, Zhong M. All-Inorganic Perovskite CsPb 2Br 5 Nanosheets for Photodetector Application Based on Rapid Growth in Aqueous Phase. ACS APPLIED MATERIALS & INTERFACES 2020; 12:41919-41931. [PMID: 32829630 DOI: 10.1021/acsami.0c05754] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
All-inorganic cesium lead-halide perovskites exhibit a great development prospect in optoelectronic devices owing to their stability and remarkable optoelectronic properties. Herein, we investigate the solution-processed synthesis of perovskite CsPb2Br5 nanosheets by using aqueous and ethanol as solvents. The results show that the aqueous environment ensures the phase formation of CsPb2Br5 and that the supersaturated solution in ethanol boosts nucleation of the nanosheets. The substrate temperature is the key factor for the evolution of morphology and the variation of the thickness of CsPb2Br5 nanosheets. Lower substrate temperature (<35 °C) is conducive to the formation of evenly distributed nanosheets with less stacking. The spatial and time-resolved fluorescence spectra indicate the heterogeneity of the defect density and the recombination process in different nanosheet regions. The photodetector based on the prepared CsPb2Br5 nanosheet displays an excellent switching current ratio (9 × 102), a short rise and decay time (43 and 83 ms, respectively), and good stability (75% of the initial current after 90 days in air). In addition, the mechanical stability and flexibility of the photodetector on the flexible substrate are investigated for 500 bending cycles.
Collapse
Affiliation(s)
- Rendong Wang
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Zhao Li
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Shutao Li
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Pengfei Wang
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Junshan Xiu
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Gongxiang Wei
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Huiqiang Liu
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Ning Jiang
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Yunyan Liu
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Mianzeng Zhong
- Hunan Key Laboratory of Super-Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, Hunan 410083, China
| |
Collapse
|
11
|
Huang ZP, Ma B, Wang H, Li N, Liu RT, Zhang ZQ, Zhang XD, Zhao JH, Zheng PZ, Wang Q, Zhang HL. In Situ Growth of 3D/2D (CsPbBr 3/CsPb 2Br 5) Perovskite Heterojunctions toward Optoelectronic Devices. J Phys Chem Lett 2020; 11:6007-6015. [PMID: 32628484 DOI: 10.1021/acs.jpclett.0c01757] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Two-dimensional (2D) CsPb2Br5 exhibits intriguing functions in enhancing the performance of optoelectronic devices in terms of environmental stability and luminescence properties when composited with other perovskites in different dimensionalities. We built a type I three-dimensional (3D) CsPbBr3/2D CsPb2Br5 heterojunction through phase transition where CsPbBr3 quantum dots in situ grew into 2D CsPb2Br5. A thorough growth mechanism study in combination with excited state dynamic investigations via femtosecond spectroscopy and first-principles calculations revealed that the type I hierarchy enhanced the stability of the heterojunction and spurred its luminous quantum yield by prolonging the lifetime of photogenerated carriers. Mixing the heterojunction with other phosphors yielded white-light-emitting diodes with a color rendering index of 94%. The work thus not only offered one new avenue for building heterojunctions by using the "soft crystal" nature of perovskites but also disentangled the enhanced luminescence mechanism of the heterojunction that can be harnessed for promising applications in the luminescence and display fields.
Collapse
Affiliation(s)
- Zhi-Peng Huang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Bo Ma
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Hao Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Na Li
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Rui-Tong Liu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Ze-Qi Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Dong Zhang
- National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment, Harbin 150001, China
| | - Ji-Hua Zhao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Pei-Zhu Zheng
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Qiang Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Hao-Li Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
12
|
Feng J, Han X, Huang H, Meng Q, Zhu Z, Yu T, Li Z, Zou Z. Curing the fundamental issue of impurity phases in two-step solution-processed CsPbBr 3 perovskite films. Sci Bull (Beijing) 2020; 65:726-737. [PMID: 36659106 DOI: 10.1016/j.scib.2020.01.025] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 01/04/2020] [Accepted: 01/19/2020] [Indexed: 01/21/2023]
Abstract
Inorganic lead halide perovskite CsPbBr3 offers attractive photophysical properties and phase stability for high-performance optoelectronic devices. However, CsPbBr3 films produced by the classic solution-based two-step method are always accompanied with impurity phases of CsPb2Br5 and Cs4PbBr6, which represents a major efficiency-limiting factor for future advances of CsPbBr3-based devices. The challenge lies in the complexity of the Cs-Pb-Br phase system, requiring both spatially and temporally precise control of the precursor stoichiometry during solution-phase growth of CsPbBr3 films. By adopting 2-methoxyethanol as the solution conversion medium instead of commonly applied methanol, the reaction between CsBr and PbBr2 can be finely controlled to yield single phase CsPbBr3 films within a few minutes; extending the solution-conversion step to 24 h does not alter the phase purity of resulting CsPbBr3 films. The present work paves the way to regulate the crystal growth behaviors of two-step solution-processed CsPbBr3 films by simple solvent engineering.
Collapse
Affiliation(s)
- Jianyong Feng
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
| | - Xiaopeng Han
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China
| | - Huiting Huang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
| | - Qingxiao Meng
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China
| | - Zhi Zhu
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China
| | - Tao Yu
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China.
| | - Zhaosheng Li
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China.
| | - Zhigang Zou
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China; School of Physics, Nanjing University, Nanjing 210093, China
| |
Collapse
|
13
|
Zhang X, Shi H, Dai H, Zhang X, Sun XW, Zhang Z. Exciton-Polariton Properties in Planar Microcavity of Millimeter-Sized Two-Dimensional Perovskite Sheet. ACS APPLIED MATERIALS & INTERFACES 2020; 12:5081-5089. [PMID: 31903740 DOI: 10.1021/acsami.9b19968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, the self-organized two-dimensional (2D) perovskite crystal sheet was synthesized for exciton-polariton studies. The layered 2D perovskite sheets naturally form Fabry-Pérot (F-P) optical cavities and exhibit evident cavity polariton modes. In the region of F-P cavity polariton modes, an exciton-polariton is formed by the superposition of strongly coupled exciton and photon states and the decreased spacing between two adjacent oscillation modes can be well explained by the formation of exciton polarities. Rabi splitting energy (Ω) evaluated from the energy-wavevector (E-k) dispersion relation of exciton-polariton coupling was about 259 ± 10 meV. For edge emissions of the laminated structure, the thickness-dependent quantum well exerts great influence on the band-gap absorption and emission. This work studies exciton-polariton properties in layered 2D perovskite sheets, making it possible application for polariton devices in the strong light-matter interaction region.
Collapse
Affiliation(s)
- Xiaoli Zhang
- Nano Opto-Electronics Lab, School of Science and Engineering, Shenzhen Key Laboratory of Semiconductor Lasers , The Chinese University of Hong Kong , Shenzhen 518172 , China
| | - Huafeng Shi
- Department of Electrical and Electronic Engineering , Southern University of Science and Technology , Shenzhen 518055 , China
- Harbin Institute of Technology , Harbin 150001 , China
| | - Haitao Dai
- School of Science , Tianjin University , Tianjin 300072 , China
| | - Xinhai Zhang
- Department of Electrical and Electronic Engineering , Southern University of Science and Technology , Shenzhen 518055 , China
| | - Xiao Wei Sun
- Department of Electrical and Electronic Engineering , Southern University of Science and Technology , Shenzhen 518055 , China
| | - Zhaoyu Zhang
- Nano Opto-Electronics Lab, School of Science and Engineering, Shenzhen Key Laboratory of Semiconductor Lasers , The Chinese University of Hong Kong , Shenzhen 518172 , China
| |
Collapse
|
14
|
Lin C, Liu L, Xu J, Fang F, Jiang K, Liu Z, Wang Y, Chen F, Yao H. Facile synthesis of a dual-phase CsPbBr3–CsPb2Br5 single crystal and its photoelectric performance. RSC Adv 2020; 10:20745-20752. [PMID: 35517769 PMCID: PMC9054283 DOI: 10.1039/d0ra01239d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 05/25/2020] [Indexed: 11/21/2022] Open
Abstract
The emerging metal-halide perovskites are promising for next generation optoelectronic devices. Recently, all-inorganic halide perovskites have been developed and show significantly improved stability compared with organic–inorganic hybrid halide perovskites. Here, we report a facile method based on the coffee ring effect of solvents to synthesize dual-phase CsPbBr3–CsPb2Br5 single crystal microsheets for the first time. The prepared dual-phase CsPbBr3–CsPb2Br5 single crystal is composed of a tetragonal crystalline phase of CsPb2Br5 and a monoclinic phase of CsPbBr3 according to X-ray diffraction (XRD) patterns. The sharp XRD peaks indicate the high crystallinity of the as-synthesized dual-phase CsPbBr3–CsPb2Br5 microsheets. CsPbBr3 is mainly distributed on the edge of the microsheets based on photoluminescence (PL) mapping images. Besides, a photodetector based on the dual-phase CsPbBr3–CsPb2Br5 microsheets exhibits good performance with a high on/off photocurrent ratio of 300 and a photoresponsivity of 2.68 mA W−1. The rise and decay times of the CsPbBr3–CsPb2Br5 microsheet photodetector are around 25.3 ms and 29.6 ms, respectively. The experimental results indicate that the dual-phase CsPbBr3–CsPb2Br5 microsheet could be a good candidate for the fabrication of high-performance micro photodetectors compatible with practical applications. Dual-phase CsPbBr3–CsPb2Br5 single crystal microsheets were synthesized by a simple method based on the coffee ring effect.![]()
Collapse
Affiliation(s)
- Congjian Lin
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Lai Liu
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Jinzhuo Xu
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Feier Fang
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Ke Jiang
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Zexiang Liu
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| | - Ye Wang
- Key Laboratory of Material Physics of Ministry of Education
- School of Physics and Engineering
- Zhengzhou University
- Zhengzhou 450052
- China
| | - Fuming Chen
- School of Physics and Telecommunication Engineering
- South China Normal University
- Guangzhou 510006
- China
| | - Huizhen Yao
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen 518060
| |
Collapse
|
15
|
Zhou YQ, Xu J, Liu JB, Liu BX. Green Emission Induced by Intrinsic Defects in All-Inorganic Perovskite CsPb 2Br 5. J Phys Chem Lett 2019; 10:6118-6123. [PMID: 31538483 DOI: 10.1021/acs.jpclett.9b02367] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
All-inorganic perovskites with improved stability are expected to be better candidates for optoelectronics, compared to organic-inorganic hybrid perovskites. A new member of all-inorganic perovskites, CsPb2Br5, has attracted great attention for its promising applications in optoelectronic devices. However, the origins of the green emission in CsPb2Br5 have been actively debated. By using first-principles calculations, we find that CsPb and VBr are dominant intrinsic defects independent of the growth conditions within the stable region of CsPb2Br5. Interestingly, we suggest that individual intrinsic defects do not lead to the green emission of CsPb2Br5, while the donor-acceptor pair recombination of CsPb and VBr possibly does. Our findings provide new insights into the experimental controversy about the green emission and its origins in CsPb2Br5 from the perspective of intrinsic defects, which help to extend the application of CsPb2Br5 in optoelectronic devices.
Collapse
Affiliation(s)
- Yu-Qian Zhou
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
| | - Jian Xu
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
| | - Jian-Bo Liu
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
| | - Bai-Xin Liu
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
| |
Collapse
|
16
|
Wang C, Wang Y, Su X, Hadjiev VG, Dai S, Qin Z, Calderon Benavides HA, Ni Y, Li Q, Jian J, Alam MK, Wang H, Robles Hernandez FC, Yao Y, Chen S, Yu Q, Feng G, Wang Z, Bao J. Extrinsic Green Photoluminescence from the Edges of 2D Cesium Lead Halides. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902492. [PMID: 31231895 DOI: 10.1002/adma.201902492] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/07/2019] [Indexed: 05/06/2023]
Abstract
Since the first report of the green emission of 2D all-inorganic CsPb2 Br5 , its bandgap and photoluminescence (PL) origin have generated intense debate and remained controversial. After the discovery that PL centers occupy only specific morphological structures in CsPb2 Br5 , a two-step highly sensitive and noninvasive optical technique is employed to resolve the controversy. Same-spot Raman-PL as a static property-structure probe reveals that CsPbBr3 nanocrystals are contributing to the green emission of CsPb2 Br5 ; pressure-dependent Raman-PL with a diamond anvil cell as a dynamic probe further rules out point defects such as Br vacancies as an alternative mechanism. Optical absorption under hydrostatic pressure shows that the bandgap of CsPb2 Br5 is 0.3-0.4 eV higher than previously reported values and remains nearly constant with pressure up to 2 GPa in good agreement with full-fledged density functional theory (DFT) calculations. Using ion exchange of Br with Cl and I, it is further proved that CsPbBr3- x Xx (X = Cl or I) is responsible for the strong visible PL in CsPb2 Br5- x Xx . This experimental approach is applicable to all PL-active materials to distinguish intrinsic defects from extrinsic nanocrystals, and the findings pave the way for new design and development of highly efficient optoelectronic devices based on all-inorganic lead halides.
Collapse
Affiliation(s)
- Chong Wang
- School of Materials Science and Engineering, Yunnan University, Kunming, Yunnan, 650500, China
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Yanan Wang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Xinghua Su
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- School of Materials Science and Engineering, Chang'an University, Xi'an, Shaanxi, 710061, China
| | - Viktor G Hadjiev
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
- Department of Mechanical Engineering, University of Houston, Houston, TX, 77204, USA
| | - Shenyu Dai
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- College of Electronics and Information Engineering, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Zhaojun Qin
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | | | - Yizhou Ni
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
- Department of Physics, University of Houston, Houston, TX, 77204, USA
| | - Qiang Li
- Department of Materials Engineering, Purdue University West Lafayette, IN, 47907, USA
| | - Jie Jian
- Department of Materials Engineering, Purdue University West Lafayette, IN, 47907, USA
| | - Md Kamrul Alam
- Materials Science and Engineering, University of Houston, Houston, TX, 77204, USA
| | - Haiyan Wang
- Department of Materials Engineering, Purdue University West Lafayette, IN, 47907, USA
| | - Francisco C Robles Hernandez
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Mechanical Engineering Technology, University of Houston, Houston, TX, 77204, USA
| | - Yan Yao
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
- Materials Science and Engineering, University of Houston, Houston, TX, 77204, USA
| | - Shuo Chen
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
- Department of Physics, University of Houston, Houston, TX, 77204, USA
| | - Qingkai Yu
- Ingram School of Engineering, Texas State University, San Marcos, TX, 78666, USA
| | - Guoying Feng
- College of Electronics and Information Engineering, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Jiming Bao
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Materials Science and Engineering, University of Houston, Houston, TX, 77204, USA
| |
Collapse
|