1
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Wang Z, Ding Z, Wu N, Lang L, Wang S, Zhao K, Liu SF. Defect Passivation and Crystallization Regulation for Efficient and Stable Formamidinium Lead Iodide Solar Cells with Multifunctional Amidino Additive. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403566. [PMID: 38949415 DOI: 10.1002/smll.202403566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Indexed: 07/02/2024]
Abstract
Amidino-based additives show great potential in high-performance perovskite solar cells (PSCs). However, the role of different functional groups in amidino-based additives have not been well elucidated. Herein, two multifunctional amidino additives 4-amidinobenzoic acid hydrochloride (ABAc) and 4-amidinobenzamide hydrochloride (ABAm) are employed to improve the film quality of formamidinium lead iodide (FAPbI3) perovskites. Compared with ABAc, the amide group imparts ABAm with larger dipole moment and thus stronger interactions with the perovskite components, i.e., the hydrogen bonds between N…H and I- anion and coordination bonds between C = O and Pb2+ cation. It strengthens the passivation effect of iodine vacancy defect and slows down the crystallization process of α-FAPbI3, resulting in the significantly reduced non-radiative recombination, long carrier lifetime of 1.7 µs, uniformly large crystalline grains, and enhances hydrophobicity. Profiting from the improved film quality, the ABAm-treated PSC achieves a high efficiency of 24.60%, and maintains 93% of the initial efficiency after storage in ambient environment for 1200 hours. This work provides new insights for rational design of multifunctional additives regarding of defect passivation and crystallization control toward highly efficient and stable PSCs.
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Affiliation(s)
- Zhichao Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Zicheng Ding
- Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Nan Wu
- Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Lei Lang
- Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Shiqiang Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Kui Zhao
- Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Shengzhong Frank Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
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2
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Kim HS, Yun HS, Seo CE, Bin Yoo S, Kang BJ, Jung EH, Jeon NJ. Ethanol purification enables high-quality α-phase FAPbI 3 perovskite microcrystals for commercial photovoltaic applications. NANOSCALE HORIZONS 2024; 9:1120-1127. [PMID: 38693879 DOI: 10.1039/d4nh00061g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Reliable quality and sustainable processes must be developed for commodities to enter the commercial stage. For next-generation photovoltaic applications such as perovskite solar cells, it is essential to manufacture high-quality photoactive perovskites via eco-friendly processes. We demonstrate that ethanol, an ideal green solvent, can be applied to yield efficient alpha-phase FAPbI3 perovskite microcrystals.
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Affiliation(s)
- Hyun Seo Kim
- Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
- Department of Energy Engineering, Korea Institute of Energy Technology (KENTECH), 21 KENTECH-gil, Naju, 58330, Republic of Korea.
| | - Hyun-Sung Yun
- Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
| | - Chae-Eun Seo
- Department of Energy Engineering, Korea Institute of Energy Technology (KENTECH), 21 KENTECH-gil, Naju, 58330, Republic of Korea.
| | - Soo Bin Yoo
- Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
| | - Bong Joo Kang
- Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
| | - Eui Hyuk Jung
- Department of Energy Engineering, Korea Institute of Energy Technology (KENTECH), 21 KENTECH-gil, Naju, 58330, Republic of Korea.
| | - Nam Joong Jeon
- Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
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3
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Shen C, Ye T, Yang P, Chen G. All-Inorganic Perovskite Solar Cells: Defect Regulation and Emerging Applications in Extreme Environments. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2401498. [PMID: 38466354 DOI: 10.1002/adma.202401498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 02/23/2024] [Indexed: 03/13/2024]
Abstract
All-inorganic perovskite solar cells (PSCs), such as CsPbX3, have garnered considerable attention recently, as they exhibit superior thermodynamic and optoelectronic stabilities compared to the organic-inorganic hybrid PSCs. However, the power conversion efficiency (PCE) of CsPbX3 PSCs is generally lower than that of organic-inorganic hybrid PSCs, as they contain higher defect densities at the interface and within the perovskite light-absorbing layers, resulting in higher non-radiative recombination and voltage loss. Consequently, defect regulation has been adopted as an important strategy to improve device performance and stability. This review aims to comprehensively summarize recent progresses on the defect regulation in CsPbX3 PSCs, as well as their cutting-edge applications in extreme scenarios. The underlying fundamental mechanisms leading to the defect formation in the crystal structure of CsPbX3 PSCs are firstly discussed, and an overview of literature-adopted defect regulation strategies in the context of interface, internal, and surface engineering is provided. Cutting-edge applications of CsPbX3 PSCs in extreme environments such as outer space and underwater situations are highlighted. Finally, a summary and outlook are presented on future directions for achieving higher efficiencies and superior stability in CsPbX3 PSCs.
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Affiliation(s)
- Cong Shen
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Tengling Ye
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Peixia Yang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Guanying Chen
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
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Ren D, Li X, Zhang Z, Chen X, Liu Z, Yang M, Mo Y, Li Z, Chen J, Liu X, Dai S, Cai M. Enhanced Charge Transfer in Quasi-2D Perovskite by Formamidinium Cation Gradient Incorporation for Efficient and Stable Solar Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401831. [PMID: 38733226 DOI: 10.1002/smll.202401831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/21/2024] [Indexed: 05/13/2024]
Abstract
Quasi-2D perovskites have attracted much attention in perovskite photovoltaics due to their excellent stability. However, their photoelectric conversion efficiency (PCE) still lags 3D counterparts, particularly with high short-circuit current (JSC) loss. The quantum confinement effect is pointed out to be the sole reason, which introduces widened bandgap and poor exciton dissociation, and undermines the light capture and charge transport. Here, the gradient incorporation of formamidinium (FA) cations into quasi-2D perovskite is proposed to address this issue. It is observed that FA prefers to incorporate into the larger n value phases near the film surface compared to the smaller n value phases in the bulk, resulting in a narrow bandgap and gradient structure within the film. Through charge dynamic analysis using in situ light-dark Kelvin probe force microscopy and transient absorption spectroscopy, it is demonstrated that incorporating 10% FA significantly facilitates efficient charge transfer between low n-value phases in the bulk and high n-value nearby film surface, leading to reduced charge accumulation. Ultimately, the device based on (AA)2(MA0.9FA0.1)4Pb5I16, where AA represents n-amylamine renowned for its exceptional environmental stability as a bulky organic ligand, achieves an impressive power conversion efficiency (PCE) of 18.58% and demonstrates enhanced illumination and thermal stability.
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Affiliation(s)
- Dongxu Ren
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Xing Li
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China
| | - Zhao Zhang
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Xianggang Chen
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Zhike Liu
- School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Miao Yang
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Yaqi Mo
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Zhuoxin Li
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Jieqiong Chen
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Xuepeng Liu
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, 102206, China
| | - Songyuan Dai
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, 102206, China
| | - Molang Cai
- Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, 102206, China
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Alaei A, Mohajerani SS, Schmelmer B, Rubio TI, Bendesky J, Kim MW, Ma Y, Jeong S, Zhou Q, Klopfenstein M, Avalos CE, Strauf S, Lee SS. Scaffold-Guided Crystallization of Oriented α-FAPbI 3 Nanowire Arrays for Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2023; 15:56127-56137. [PMID: 37987696 DOI: 10.1021/acsami.3c09434] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Perovskite nanowire arrays with large surface areas for efficient charge transfer and continuous highly crystalline domains for efficient charge transport exhibit ideal morphologies for solar-cell active layers. Here, we introduce a room temperature two-step method to grow dense, vertical nanowire arrays of formamidinium lead iodide (FAPbI3). PbI2 nanocrystals embedded in the cylindrical nanopores of anodized titanium dioxide scaffolds were converted to FAPbI3 by immersion in a FAI solution for a period of 0.5-30 min. During immersion, FAPbI3 crystals grew vertically from the scaffold surface as nanowires with diameters and densities determined by the underlying scaffold. The presence of butylammonium cations during nanowire growth stabilized the active α polymorph of FAPbI3, precluding the need for a thermal annealing step. Solar cells comprising α-FAPbI3 nanowire arrays exhibited maximum solar conversion efficiencies of >14%. Short-circuit current densities of 22-23 mA cm-2 were achieved, on par with those recorded for the best-performing FAPbI3 solar cells reported to date. Such large photocurrents are attributed to the single-crystalline, low-defect nature of the nanowires and increased interfacial area for photogenerated charge transfer compared with thin films.
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Affiliation(s)
- Aida Alaei
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Seyed Sepehr Mohajerani
- Department of Physics, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Ben Schmelmer
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Thiago I Rubio
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Justin Bendesky
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Min-Woo Kim
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Yichen Ma
- Department of Physics, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Sehee Jeong
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Qintian Zhou
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Mia Klopfenstein
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Claudia E Avalos
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Stefan Strauf
- Department of Physics, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Stephanie S Lee
- Department of Chemistry and Molecular Design Institute, New York University, New York, New York 10003, United States
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6
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Mandal TN, Heo JH, Im SH, Kim WS. Highly Efficient and Stable Inverted Perovskite Solar Cell Using Pure δ-FAPbI 3 Single Crystals. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2305246. [PMID: 37635119 DOI: 10.1002/smll.202305246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/27/2023] [Indexed: 08/29/2023]
Abstract
Pure δ-formamidinium lead triiodide (δ-FAPbI3 ) single crystal for highly efficient perovskite solar cell (PCS) with long-term stability is prepared by a new method consisting of liquid phase reaction of FAI and PbI2 in N,N-dimethyl formamide and antisolvent crystallization using acetonitrile. In this method, the incorporation of any impurity into the crystal is excluded by the molecular recognition of the crystal growth site. This pure crystal is used to fabricate α-FAPbI3 inverted PSCs which showed excellent power conversion efficiency (PCE) due to much-reduced trap-states. The champion device exhibited a high PCE of 23.48% under the 1-Sun condition. Surface-treated devices with 3-(aminomethyl)pyridine showed a significantly improved PCE of 25.07%. In addition, the unencapsulated device maintained 97.22% of its initial efficiency under continuous 1-Sun illumination for 1,000 h at 85 °C in an N2 atmosphere ensuring long-term thermal and photo stabilities of PSCs, whereas the control device kept only 89.93%.
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Affiliation(s)
- Tarak Nath Mandal
- Functional Crystallization Center, Department of Chemical Engineering (Integrated Engineering), Kyung Hee University, Yongin, Gyeonggi-do, 17104, Republic of Korea
| | - Jin Hyuck Heo
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 02841, Republic of Korea
| | - Sang Hyuk Im
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 02841, Republic of Korea
| | - Woo-Sik Kim
- Functional Crystallization Center, Department of Chemical Engineering (Integrated Engineering), Kyung Hee University, Yongin, Gyeonggi-do, 17104, Republic of Korea
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7
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Grisard S, Trifonov AV, Solovev IA, Yakovlev DR, Hordiichuk O, Kovalenko MV, Bayer M, Akimov IA. Long-Lived Exciton Coherence in Mixed-Halide Perovskite Crystals. NANO LETTERS 2023; 23:7397-7403. [PMID: 37548595 DOI: 10.1021/acs.nanolett.3c01817] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Compositional engineering of the optical properties of hybrid organic-inorganic lead halide perovskites is crucial for the realization of efficient solar cells and light-emitting devices. We study the effect of band gap fluctuations on coherent exciton dynamics in a mixed FA0.9Cs0.1PbI2.8Br0.2 perovskite crystal by using photon echo spectroscopy. We reveal a narrow homogeneous exciton line width of 16 μeV at a temperature of 1.5 K. The corresponding exciton coherence time T2 = 83 ps is exceptionally long due to the localization of excitons at the scale of tens to hundreds of nanometers. From spectral and temperature dependences of the two- and three-pulse photon echo decay, we conclude that for low-energy excitons pure decoherence associated with elastic scattering on phonons is comparable with the exciton lifetime, while for excitons with higher energies, inelastic scattering to lower energy states via phonon emission dominates.
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Affiliation(s)
- Stefan Grisard
- Experimentelle Physik 2, Technische Universität Dortmund, Dortmund 44221, Germany
| | - Artur V Trifonov
- Experimentelle Physik 2, Technische Universität Dortmund, Dortmund 44221, Germany
| | - Ivan A Solovev
- Experimentelle Physik 2, Technische Universität Dortmund, Dortmund 44221, Germany
- Institute of Physics, University of Oldenburg, Carl von Ossietzky Strasse 9-11, Oldenburg 26129, Germany
| | - Dmitri R Yakovlev
- Experimentelle Physik 2, Technische Universität Dortmund, Dortmund 44221, Germany
| | - Oleh Hordiichuk
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich CH-8093, Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf CH-8600, Switzerland
| | - Maksym V Kovalenko
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich CH-8093, Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf CH-8600, Switzerland
| | - Manfred Bayer
- Experimentelle Physik 2, Technische Universität Dortmund, Dortmund 44221, Germany
| | - Ilya A Akimov
- Experimentelle Physik 2, Technische Universität Dortmund, Dortmund 44221, Germany
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Cimrová V, Guesmi M, Eom S, Kang Y, Výprachtický D. Formamidinium Lead Iodide Perovskite Thin Films Formed by Two-Step Sequential Method: Solvent-Morphology Relationship. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1049. [PMID: 36770056 PMCID: PMC9919648 DOI: 10.3390/ma16031049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/11/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Thin films made of formamidinium lead iodide (FAPbI3) perovskites prepared by a two-step sequential deposition method using various solvents for formamidinium iodide (FAI) - isopropanol, n-butanol and tert-butanol, were studied with the aim of finding a correlation between morphology and solvent properties to improve film quality. They were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) and their photophysical properties were studied by means of absorption and photoluminescence (PL) spectroscopies. XRD patterns, absorption and PL spectra proved α-phase formation for all selected solvents. An excessive amount of PbI2 found in perovskite films prepared with n-butanol indicates incomplete conversion. Thin film morphology, such as grain and crystallite size, depended on the solvent. Using tert-butanol, thin films with a very large grain size of up to several micrometers and with preferred crystallite orientation were fabricated. The grain size increased as follows: 0.2-0.5, 0.2-1 and 2-5 µm for isopropanol, n-butanol and tert-butanol, respectively. A correlation between the grain size and viscosity, electric permittivity and polarizability of the solvent could be considered. Our results, including fabrication of perovskite films with large grains and fewer grain boundaries, are important and of interest for many optoelectronic applications.
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Affiliation(s)
- Věra Cimrová
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague 6, Czech Republic
| | - Mariem Guesmi
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague 6, Czech Republic
| | - Sangwon Eom
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea
| | - Youngjong Kang
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea
- Institute of Nano Science and Technology, Hanyang University, Seoul 04763, Republic of Korea
- Research Institute for Natural Sciences, Hanyang University, Seoul 04763, Republic of Korea
| | - Drahomír Výprachtický
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague 6, Czech Republic
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9
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Synthesis, Photoluminescence and Vibrational Properties of Aziridinium Lead Halide Perovskites. Molecules 2022; 27:molecules27227949. [PMID: 36432050 PMCID: PMC9698367 DOI: 10.3390/molecules27227949] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/12/2022] [Accepted: 11/13/2022] [Indexed: 11/19/2022] Open
Abstract
Three-dimensional lead halide perovskites are known for their excellent optoelectronic properties, making them suitable for photovoltaic and light-emitting applications. Here, we report for the first time the Raman spectra and photoluminescent (PL) properties of recently discovered three-dimensional aziridinium lead halide perovskites (AZPbX3, X = Cl, Br, I), as well as assignment of vibrational modes. We also report diffuse reflection data, which revealed an extended absorption of light of AZPbX3 compared to the MA and FA counterparts and are beneficial for solar cell application. We demonstrated that this behavior is correlated with the size of the organic cation, i.e., the energy band gap of the cubic lead halide perovskites decreases with the increasing size of the organic cation. All compounds show intense PL, which weakens on heating and shifts toward higher energies. This PL is red shifted compared to the FA and MA counterparts. An analysis of the PL data revealed the small exciton binding energy of AZPbX3 compounds (29-56 meV). Overall, the properties of AZPbX3 are very similar to those of the well-known MAPbX3 and FAPbX3 perovskites, indicating that the aziridinium analogues are also attractive materials for light-emitting and solar cell applications.
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10
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Nitrogen-Doped Titanium Dioxide as a Hole Transport Layer for High-Efficiency Formamidinium Perovskite Solar Cells. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227927. [PMID: 36432027 PMCID: PMC9694249 DOI: 10.3390/molecules27227927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/02/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
Perovskite solar cells (PSCs) offer advantages over widely deployed silicon solar cells in terms of ease of fabrication; however, the device is still under rigorous materials optimization for cell performance, stability, and cost. In this work, we explore a version of a PSC by replacing the polymeric hole transport layer (HTL) such as Spiro-OMeTAD, P3HT, and PEDOT: PSS with a more air-stable metal oxide, viz., nitrogen-doped titanium dioxide (TiO2:N). Numerical simulations on formamidinium (FA)-based PSCs in the FTO/TiO2/FAPbI3/Ag configuration have been carried out to depict the behaviour of the HTL as well as the effect of absorber layer thickness (∆t) on photovoltaic parameters. The results show that the cell output increases when the HTL bandgap increases from 2.5 to 3.0 eV. By optimizing the absorber layer thickness and the gradient in defect density (Nt), the device structure considered here can deliver a maximum power conversion efficiency of ~21.38% for a lower HTL bandgap (~2.5 eV) and ~26.99% for a higher HTL bandgap of ~3.0 eV. The results are validated by reproducing the performance of PSCs employing commonly used polymeric HTLs, viz. Spiro-OMeTAD, P3HT, and PEDOT: PSS as well as high power conversion efficiency in the highly crystalline perovskite layer. Therefore, the present study provides high-performing, cost-effective PSCs using TiO2:N.
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11
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Fan W, Deng K, Shen Y, Bai Y, Li L. Moisture‐Accelerated Precursor Crystallisation in Ambient Air for High‐Performance Perovskite Solar Cells toward Mass Production. Angew Chem Int Ed Engl 2022; 61:e202211259. [DOI: 10.1002/anie.202211259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Weili Fan
- Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing 100083 P. R. China
| | - Kaimo Deng
- School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Soochow University Suzhou 215006 P. R. China
| | - Ying Shen
- School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Soochow University Suzhou 215006 P. R. China
| | - Yang Bai
- Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing 100083 P. R. China
| | - Liang Li
- School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Soochow University Suzhou 215006 P. R. China
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12
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Fan W, Deng K, Shen Y, Bai Y, Li L. Moisture Accelerated Precursor Crystallization in Ambient Air for High‐performance Perovskite Solar Cells toward Mass Production. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Weili Fan
- University of Science and Technology Beijing Institute for Advanced Materials and Technology CHINA
| | - Kaimo Deng
- Soochow University School of Physical Science and Technology CHINA
| | - Ying Shen
- Soochow University School of Physical Science and Technology CHINA
| | - Yang Bai
- University of Science and Technology Beijing Institute for Advanced Materials and Technology CHINA
| | - Liang Li
- Soochow University No 1, Shizi street 215006 Suzhou CHINA
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Wang Y, Zhao H, Piotrowski M, Han X, Ge Z, Dong L, Wang C, Pinisetty SK, Balguri PK, Bandela AK, Thumu U. Cesium Lead Iodide Perovskites: Optically Active Crystal Phase Stability to Surface Engineering. MICROMACHINES 2022; 13:mi13081318. [PMID: 36014240 PMCID: PMC9414704 DOI: 10.3390/mi13081318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/07/2022] [Accepted: 08/10/2022] [Indexed: 05/04/2023]
Abstract
Among perovskites, the research on cesium lead iodides (CsPbI3) has attracted a large research community, owing to their all-inorganic nature and promising solar cell performance. Typically, the CsPbI3 solar cell devices are prepared at various heterojunctions, and working at fluctuating temperatures raises questions on the material stability-related performance of such devices. The fundamental studies reveal that their poor stability is due to a lower side deviation from Goldschmidt's tolerance factor, causing weak chemical interactions within the crystal lattice. In the case of organic-inorganic hybrid perovskites, where their stability is related to the inherent chemical nature of the organic cations, which cannot be manipulated to improve the stability drastically whereas the stability of CsPbI3 is related to surface and lattice engineering. Thus, the challenges posed by CsPbI3 could be overcome by engineering the surface and inside the CsPbI3 crystal lattice. A few solutions have been proposed, including controlled crystal sizes, surface modifications, and lattice engineering. Various research groups have been working on these aspects and had accumulated a rich understanding of these materials. In this review, at first, we survey the fundamental aspects of CsPbI3 polymorphs structure, highlighting the superiority of CsPbI3 over other halide systems, stability, the factors (temperature, polarity, and size influence) leading to their phase transformations, and electronic band structure along with the important property of the defect tolerance nature. Fortunately, the factors stabilizing the most effective phases are achieved through a size reduction and the efficient surface passivation on the delicate CsPbI3 nanocrystal surfaces. In the following section, we have provided the up-to-date surface passivating methods to suppress the non-radiative process for near-unity photoluminescence quantum yield, while maintaining their optically active phases, especially through molecular links (ligands, polymers, zwitterions, polymers) and inorganic halides. We have also provided recent advances to the efficient synthetic protocols for optically active CsPbI3 NC phases to use readily for solar cell applications. The nanocrystal purification techniques are challenging and had a significant effect on the device performances. In part, we summarized the CsPbI3-related solar cell device performances with respect to the device fabrication methods. At the end, we provide a brief outlook on the view of surface and lattice engineering in CsPbI3 NCs for advancing the enhanced stability which is crucial for superior optical and light applications.
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Affiliation(s)
- Yixi Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Hairong Zhao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Marek Piotrowski
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Xiao Han
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Zhongsheng Ge
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Lizhuang Dong
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Chengjie Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Sowjanya Krishna Pinisetty
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Praveen Kumar Balguri
- Department of Aeronautical Engineering, Institute of Aeronautical Engineering, Hyderabad 500043, India
| | - Anil Kumar Bandela
- Department of Chemistry, Ben Gurion University of the Negev, Beer Sheva 84105, Israel
- Correspondence: (A.K.B.); (U.T.)
| | - Udayabhaskararao Thumu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
- Correspondence: (A.K.B.); (U.T.)
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Lin HS, Doba T, Sato W, Matsuo Y, Shang R, Nakamura E. Triarylamine/Bithiophene Copolymer with Enhanced Quinoidal Character as Hole-Transporting Material for Perovskite Solar Cells. Angew Chem Int Ed Engl 2022; 61:e202203949. [PMID: 35404499 DOI: 10.1002/anie.202203949] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Indexed: 12/19/2022]
Abstract
Polytriarylamine is a popular hole-transporting materials (HTMs) despite its suboptimal conductivity and significant recombination at the interface in a solar cell setup. Having noted insufficient conjugation among the triarylamine units along the polymer backbone, we inserted a bithiophene unit between two triarylamine units through iron-catalyzed C-H/C-H coupling of a triarylamine/thiophene monomer so that two units conjugate effectively via four quinoidal rings when the molecule functions as HTM. The obtained triarylamine/bithiophene copolymer (TABT) used as HTM showed a high-performance in methylammonium lead iodide perovskite (MAPbI3 ) solar cells. Mesityl substituted TABT forms a uniform film, shows high hole-carrier mobility, and has an ionization potential (IP=5.40 eV) matching that of MAPbI3 . We fabricated a solar cell device with a power conversion efficiency of 21.3 % and an open-circuit voltage of 1.15 V, which exceeds the performance of devices using reference standard such as poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine (PTAA) and Spiro-OMeTAD.
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Affiliation(s)
- Hao-Sheng Lin
- Department of Chemical System Engineering, Nagoya University, Nagoya, 464-8603, Japan.,Department of Mechanical Engineering, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Takahiro Doba
- Department of Chemistry, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Wataru Sato
- Department of Chemistry, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Yutaka Matsuo
- Department of Chemical System Engineering, Nagoya University, Nagoya, 464-8603, Japan.,Department of Mechanical Engineering, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Rui Shang
- Department of Chemistry, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Eiichi Nakamura
- Department of Chemistry, The University of Tokyo, Tokyo, 113-0033, Japan
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Lin H, Doba T, Sato W, Matsuo Y, Shang R, Nakamura E. Triarylamine/Bithiophene Copolymer with Enhanced Quinoidal Character as Hole‐Transporting Material for Perovskite Solar Cells. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hao‐Sheng Lin
- Department of Chemical System Engineering Nagoya University Nagoya 464-8603 Japan
- Department of Mechanical Engineering The University of Tokyo Tokyo 113-8656 Japan
| | - Takahiro Doba
- Department of Chemistry The University of Tokyo Tokyo 113-0033 Japan
| | - Wataru Sato
- Department of Chemistry The University of Tokyo Tokyo 113-0033 Japan
| | - Yutaka Matsuo
- Department of Chemical System Engineering Nagoya University Nagoya 464-8603 Japan
- Department of Mechanical Engineering The University of Tokyo Tokyo 113-8656 Japan
| | - Rui Shang
- Department of Chemistry The University of Tokyo Tokyo 113-0033 Japan
| | - Eiichi Nakamura
- Department of Chemistry The University of Tokyo Tokyo 113-0033 Japan
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