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Huang S, Gao S, Zhang H, Bian C, Zhao Y, Gu X, Xu W. Multi-Functional Ethylene-vinyl Acetate Copolymer Flexible Composite Film Embedded with Indium Acetate-Passivated Perovskite Quantum Dots. Polymers (Basel) 2023; 15:3986. [PMID: 37836035 PMCID: PMC10575095 DOI: 10.3390/polym15193986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/02/2023] [Accepted: 09/14/2023] [Indexed: 10/15/2023] Open
Abstract
In recent years, all-inorganic cesium lead halide perovskite quantum dots have emerged as promising candidates for various optoelectronic applications, including sensors, light-emitting diodes, and solar cells, owing to their exceptional photoelectric properties. However, their commercial utilization has been limited by stability issues. In this study, we addressed this challenge by passivating the surface defects of CsPbBr3 quantum dots using indium acetate, a metal-organic compound. The resulting CsPbBr3 quantum dots exhibited not only high photoluminescence intensity, but also a remarkably narrow half-peak width of 19 nm. Furthermore, by embedding the CsPbBr3 quantum dots in ethylene-vinyl acetate, we achieved stretchability and significantly enhanced stability while preserving the original luminous intensity. The resulting composite film demonstrated the potential to improve the power conversion efficiency of crystalline silicon solar cells and enabled the creation of excellent white light-emitting diodes with coordinates of (0.33, 0.31). This co-passivation strategy, involving surface passivation and polymer packaging, provides a new idea for the practical application of CsPbBr3 quantum dots.
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Affiliation(s)
- Sheng Huang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China (Y.Z.)
| | | | | | | | | | - Xiuquan Gu
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China (Y.Z.)
| | - Wenjie Xu
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China (Y.Z.)
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2
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Padhiar MA, Ji Y, Wang M, Pan S, Ali Khan S, Khan NZ, Zhao L, Qin F, Zhao Z, Zhang S. Sr 2+doped CsPbBrI 2perovskite nanocrystals coated with ZrO 2for applications as white LEDs. NANOTECHNOLOGY 2023; 34:275201. [PMID: 37011606 DOI: 10.1088/1361-6528/acc9cc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 04/03/2023] [Indexed: 06/19/2023]
Abstract
Perovskite nanocrystals (NCs) feature adjustable bandgap, wide absorption range, and great color purity for robust perovskite optoelectronic applications. Nevertheless, the absence of lasting stability under continues energization, is still a major hurdle to the widespread use of NCs in commercial applications. In particular, the reactivity of red-emitting perovskites to environmental surroundings is more sensitive than that of their green counterparts. Here, we present a simple synthesis of ultrathin ZrO2coated, Sr2+doped CsPbBrI2NCs. Introducing divalent Sr2+may significantly eliminate Pb° surface traps, whereas ZrO2encapsulation greatly improves environmental stability. The photoluminescence quantum yield of the Sr2+-doped CsPbBrI2/ZrO2NCs was increased from 50.2% to 87.2% as a direct consequence of the efficient elimination of Pb° surface defects. Moreover, the thickness of the ZrO2thin coating gives remarkable heat resistance and improved water stability. Combining CsPbSr0.3BrI2/ZrO2NCs in a white light emitting diode (LED) with an excellent optical efficiency (100.08 lm W-1), high and a broad gamut 141% (NTSC) standard. This work offers a potential method to suppress Pb° traps by doping with Sr2+and improves the performance of perovskite NCs by ultrathin coating structured ZrO2, consequently enabling their applicability in commercial optical displays.
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Affiliation(s)
- Muhammad Amin Padhiar
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, People's Republic of China
- Research Center for Advanced Information Materials (CAIM), Huangpu Research and Graduate School of Guangzhou University, Guangzhou 510555, People's Republic of China
| | - Yongqiang Ji
- State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, People's Republic of China
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, People's Republic of China
| | - Minqiang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research & Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, People's Republic of China
| | - Shusheng Pan
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, People's Republic of China
- Research Center for Advanced Information Materials (CAIM), Huangpu Research and Graduate School of Guangzhou University, Guangzhou 510555, People's Republic of China
| | - Sayed Ali Khan
- Department of Chemistry and Chemical Engineering, Rutgers, the State University of New Jersey, 08854, United States of America
| | - Noor Zamin Khan
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, People's Republic of China
- Research Center for Advanced Information Materials (CAIM), Huangpu Research and Graduate School of Guangzhou University, Guangzhou 510555, People's Republic of China
| | - Lei Zhao
- School of Electronic Engineering Lanzhou City University, Lanzhou, 730070, People's Republic of China
| | - Fangrong Qin
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, People's Republic of China
- Research Center for Advanced Information Materials (CAIM), Huangpu Research and Graduate School of Guangzhou University, Guangzhou 510555, People's Republic of China
| | - Zhuan Zhao
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, People's Republic of China
- Research Center for Advanced Information Materials (CAIM), Huangpu Research and Graduate School of Guangzhou University, Guangzhou 510555, People's Republic of China
| | - Shaolin Zhang
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, People's Republic of China
- Research Center for Advanced Information Materials (CAIM), Huangpu Research and Graduate School of Guangzhou University, Guangzhou 510555, People's Republic of China
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3
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Oh JH, Cho SB, Park IK, Lee SN. Monolithic Multicolor Emissions of InGaN-Based Hybrid Light-Emitting Diodes Using CsPbBr 3 Green Quantum Dots. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1290. [PMID: 36770294 PMCID: PMC9921764 DOI: 10.3390/ma16031290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/28/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
To address the increasing demand for multicolor light-emitting diodes (LEDs), a monolithic multicolor LED with a simple process and high reliability is desirable. In this study, organic-inorganic hybrid LEDs with violet and green wavelengths were fabricated by depositing CsPbBr3 perovskite green quantum dots (QDs) as the light-converting material on InGaN-based violet LEDs. As the injection current was increased, the total electroluminescence (EL) intensities of the hybrid LEDs increased, whereas the light-converted green emission efficiency of the CsPbBr3 QDs decreased. The maximum green-to-violet EL spectral intensity ratio of the hybrid LEDs with CsPbBr3 QDs was achieved with the injection current of <10 mA. Moreover, the EL spectral ratio of the green-to-violet emission decreased at an injection current of 100 mA. The light-conversion intensity of the CsPbBr3 QDs decreased linearly as the junction temperature of the hybrid LEDs was increased with increasing injection current, similar to the temperature-dependent photoluminescence degradation of CsPbBr3 QDs. In addition, the junction temperature of the hybrid LED was minimized by pulse injection to suppress the thermal degradation of QDs and increase the light conversion efficiency to green emission. Therefore, the overall emission spectrum color coordinates of the hybrid LEDs exhibited a red shift from violet to blue in the low-current region and a blue shift toward violet as the green emission of the QDs was decreased above 10 mA.
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Affiliation(s)
- Jae-Hyeok Oh
- Department of IT & Semiconductor Convergence Engineering, Tech University of Korea, Siheung 15073, Republic of Korea
| | - Seung-Beom Cho
- Department of Materials and Science Engineering, Seoul National University of Science & Technology, Seoul 01811, Republic of Korea
| | - Il-Kyu Park
- Department of Materials and Science Engineering, Seoul National University of Science & Technology, Seoul 01811, Republic of Korea
| | - Sung-Nam Lee
- Department of IT & Semiconductor Convergence Engineering, Tech University of Korea, Siheung 15073, Republic of Korea
- Department of Nano & Semiconductor Engineering, Tech University of Korea, Siheung 15073, Republic of Korea
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4
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Wu N, Zhai Y, Chang P, Mei H, Wang Z, Zhang H, Zhu Q, Liang P, Wang L. Rubidium ions doping to improve the photoluminescence properties of Mn doped CsPbCl 3perovskite quantum dots. NANOTECHNOLOGY 2023; 34:145701. [PMID: 36260977 DOI: 10.1088/1361-6528/ac9b62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
All-inorganic cesium lead halide CsPbX3(X = Cl, Br, I) perovskite quantum dots (PQDs) have shown promising potential in current Mini/Micro-LED display applications due to their excellent photoluminescence performance. However, lead ions in PQDs are easily to leak owing to the unstable structure of PQDs, which hinders their commercial applications. Herein, we adopt Rb+ions co-doping strategy to regulate the doping characteristics of Mn2+ions in CsPbCl3PQDs. The synthesized CsPbCl3:(Rb+, Mn2+) PQDs possess enhanced photoluminescence quantum yield of 71.1% due to the reduction of intrinsic defect states and Mn-Mn or Mn-traps in co-doped PQDs. Moreover, the white light emission of CsPb(Cl/Br)3:(Rb+, Mn2+) PQDs is achieved by anion exchange reaction and the constructed WLED exhibits the CIE coordinate of (0.33, 0.29) and the correlated color temperature of 5497 K. Benefiting from the substitution strategy, these doped CsPbX3PQDs can be widely used as fluorescence conversion materials for the construction of Mini/Micro-LED.
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Affiliation(s)
- Na Wu
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Yue Zhai
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Peng Chang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Hang Mei
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Ziyan Wang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Hong Zhang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Qiangqiang Zhu
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Pei Liang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Le Wang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
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5
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Xia W, Ren Z, Zheng Z, Luo C, Li J, Ma W, Zhou X, Chen Y. Highly stable lanthanide-doped CsPbI 3 perovskite nanocrystals with near-unity quantum yield for efficient red light-emitting diodes. NANOSCALE 2023; 15:1109-1118. [PMID: 36594200 DOI: 10.1039/d2nr06317d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
CsPbI3 perovskite nanocrystals (NCs) are gaining popularity as promising photoactive materials for optoelectronic devices. However, their poor phase stability has caused substantial limitations in their practical application. Herein, the small-sized rare earth La cation is strategically introduced to fundamentally improve the NC phase stability against the environment, heat, and UV radiation by the partial substitution of Pb ions to suppress structural distortion and increase the formation energy. The strong interaction between La and I of the octahedra has been demonstrated to enable the effective suppression of the trap states, which promotes strengthened radiative recombination for a near-unity photoluminescence quantum yield (PLQY) of 99.3%. High energy bands have also been found for the La-doped NCs to narrow down the energy barrier for efficient hole injection. The superior optoelectronic properties of La-doped NCs promote great improvements in the perovskite light-emitting diode (PeLED) performances with a 5-fold improvement in external quantum efficiency (EQE) from 1.19 to 6.01% and 2-fold longer lifetime from 1451 to 2956 s. This work provides an effective method for small-sized metal ion-doped CsPbI3 NCs to realize high emission efficiency and phase stabilization for efficient PeLEDs.
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Affiliation(s)
- Wenlin Xia
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Zhenwei Ren
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Zhishuai Zheng
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Chengzhao Luo
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Jie Li
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Wenchen Ma
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Xin Zhou
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Yu Chen
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
- National University of Singapore Suzhou Research Institute, Dushu Lake Science and Education Innovation District, Suzhou 215123, China
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6
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Silica-coated CsPbBr3 nanocrystals with high stability for bright white-emitting displays. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Chen J, Jia D, Zhuang R, Hua Y, Zhang X. Highly Orientated Perovskite Quantum Dot Solids for Efficient Solar Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2204259. [PMID: 35905705 DOI: 10.1002/adma.202204259] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Perovskite quantum dots (PQDs) have emerged as competitive optoelectronic materials for photovoltaic applications due to their ideal bandgap energy, high defect tolerance, and solution processability. However, the highly dynamic surface and imperfect cubic structure of PQDs generally result in unfavorable charge-carrier transport within the PQD solids and serious nonradiative recombination. Herein, a highly orientated PQD solid is demonstrated using precursor engineering accompanied by a chemical stripping treatment (CST). A combination of systematic experimental studies and theoretical calculations is conducted to fundamentally understand the resurfacing of PQDs using the CST approach. The results reveal that the highly ordered PQDs can result in a high orientation of PQD solids, significantly promoting charge-carrier transport within the PQD solids. Meanwhile, the ideal cubic-structured PQD with an iodine-rich surface dramatically decreases surface trap states, thereby substantially diminishing trap-assisted nonradiative recombination. Consequently, the inorganic PQD solar cell delivers a power conversion efficiency of up to 16.25%. This work provides a feasible avenue to construct highly orientated PQD solids with improved photophysical properties for high-performance optoelectronic devices.
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Affiliation(s)
- Jingxuan Chen
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Donglin Jia
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Rongshan Zhuang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, School of Materials and Energy, Yunnan University, Kunming, 650091, China
| | - Yong Hua
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, School of Materials and Energy, Yunnan University, Kunming, 650091, China
| | - Xiaoliang Zhang
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
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8
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Yang X, Zhou S, Zhang X, Xiang L, Xie B, Luo X. Enhancing oxygen/moisture resistance of quantum dots by short-chain, densely cross-linked silica glass network. NANOTECHNOLOGY 2022; 33:465202. [PMID: 35926438 DOI: 10.1088/1361-6528/ac86de] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
Quantum dots (QDs) are facing significant photoluminescence degradation in moisture environment. In QDs-silicone composites, the poor water resistance of silicone matrix makes it easy for water and oxygen molecules to erode QDs. To tackle this issue, we proposed a new QDs protection strategy by introducing short-chain silica precursors onto the QDs' surface, so that a dense silica passivation layer could be formed onto the QDs nanoparticles. Sol-gel method based on 3-aminopropyl triethoxysilane (APTES), 3-mercaptopropyl trimethoxysilane (MPTMS), and 3-mercaptopropyl triethoxysilane (MPTES) were adopted to prepare the uniform and crack-free QDs-silica glass (QD-glass). Because of the crosslinking of short-chain precursors, the formed silica glass possesses 38.6% smaller pore width and 68.6% lower pore volume than silicone, indicating its denser cross-linked network surrounding QDs. After 360 h water immersion, the QDs-glass demonstrated a 6% enhancement in red-light peak intensity, and maintained a stable full width at half maximum (FWHM) and peak wavelength, proving its excellent water-resistant ability. However, the conventional QDs-silicone composites not only showed a decrease of 75.3% in red-light peak intensity, but also a broadened FWHM and a redshifted peak wavelength after water immersion. QDs-glass also showed superior photostability after 132 h exposure to blue light. Red-light peak intensity of QDs-glass remained 87.3% of the initial while that of QDs-silicone decreased to 19.8%. And the intensity of QDs-glass dropped to 62.3% of that under 20 °C after thermal treatment of 160 °C. Besides, under increasing driving currents, the light conversion efficiency drop of QDs-glass is only one fifth that of QDs-silicone. Based on the QDs-glass, the white light-emitting diodes was achieved with a high luminous efficiency of 126.5 lm W-1and a high color rendering index of 95.4. Thus, the newly proposed QD-glass has great significance in guaranteeing the working reliability of QDs-converted devices against moisture and high-power environment.
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Affiliation(s)
- Xuan Yang
- School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Shuling Zhou
- School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Xinfeng Zhang
- School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Linyi Xiang
- School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Bin Xie
- School of Mechanical Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Xiaobing Luo
- School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
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9
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Aqueous-phase assembly of ultra-stable perovskite nanocrystals in chiral cellulose nanocrystal films for circularly polarized luminescence. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Ji Y, Wang M, Yang Z, Wang H, Padhiar MA, Qiu H, Dang J, Miao Y, Zhou Y, Bhatti AS. Strong violet emission from ultra-stable strontium-doped CsPbCl 3 superlattices. NANOSCALE 2022; 14:2359-2366. [PMID: 35088791 DOI: 10.1039/d1nr07848h] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Among the lead halide perovskites, the photoluminescence quantum yields (PLQYs) of perovskite quantum dots (PQDs) in the violet region are the very lowest. This is an obstacle to the optical applications across the entire visible area based on perovskite materials. Herein, we report a novel strontium (Sr)-substitution along with chlorine passivation strategy to enhance the PLQYs of CsPbCl3 PQDs. We surprisingly found that when the molar ratio of Sr2+/Pb2+ = 0.1/0.9, CsSr0.1Pb0.9Cl3 PQDs exhibit strong single-color violet emission, which is attributed to the effective passivation of chlorine defects. We further found spontaneous self-assembly of PQDs into highly emissive PSCs from the precursor in a highly concentrated solution. Moreover, by dilution of these PSCs, a few small PQD aggregates can be regained, which is similar to the PQDs formed at lower concentrations. Benefiting from the superior collective properties of individual PQDs, these highly fluorescent CsSr0.1Pb0.9Cl3 PSCs can maintain good stability even when directly immersed in water or exposed to illumination.
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Affiliation(s)
- Yongqiang Ji
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
- State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China
| | - Minqiang Wang
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Zhi Yang
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Hao Wang
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Muhammad Amin Padhiar
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Hengwei Qiu
- Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China
| | - Jialin Dang
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Yinru Miao
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Yun Zhou
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Arshad Saleem Bhatti
- Centre for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad, 44500, Pakistan
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11
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Padhiar MA, Wang M, Ji Y, Yang Z, Bhatti AS. Tuning optical properties of CsPbBr 3by mixing Nd 3+trivalent lanthanide halide cations for blue light emitting devices. NANOTECHNOLOGY 2022; 33:175202. [PMID: 35026753 DOI: 10.1088/1361-6528/ac4b2e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
In recent years, significant progress has been made in the red and green perovskite quantum dots (PQDs) based light-emitting devices. However, a scarcity of blue-emitting devices that are extremely efficient precludes their research and development for optoelectronic applications. Taking advantage of tunable bandgaps of PQDs over the entire visible spectrum, herein we tune optical properties of CSPbBr3by mixing Nd3+trivalent lanthanide halide cations for blue light-emitting devices. The CsPbBr3PQDs doped with Nd3+trivalent lanthanide halide cations emitted strong photoemission from green into the blue region. By adjusting their doping concentration, a tunable wavelength from (515 nm) to (450 nm) was achieved with FWHM from (37.83 nm) to (16.6 nm). We simultaneously observed PL linewidth broadening thermal quenching of PL and the blue shift of the optical bandgap from temperature-dependent PL studies. The Nd3+cations into CsPbBr3PQDs more efficiently reduced non-radiative recombination. As a result of the efficient removal of defects from PQDs, the photoluminescence quantum yield (PLQY) has been significantly increased to 91% in the blue-emitting region. Significantly, Nd3+PQDs exhibit excellent long-term stability against the external environment, including water, temperature, and ultraviolet light irradiation. Moreover, we successfully transformed Nd3+doped PQDs into highly fluorescent nanocomposites. Incorporating these findings, we fabricate and test a stable blue light-emitting LED with EL emission at (462 nm), (475 nm), and successfully produce white light emission from Nd3+doped nanocomposites with a CIE at (0.32, 0.34), respectively. The findings imply that low-cost Nd3+doped perovskites may be attractive as light converters in LCDs with a broad color gamut.
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Affiliation(s)
- Muhammad Amin Padhiar
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Centre for Dielectric Research & Shaanxi Engineering Research Centre of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Minqiang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Centre for Dielectric Research & Shaanxi Engineering Research Centre of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Yongqiang Ji
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Centre for Dielectric Research & Shaanxi Engineering Research Centre of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Zhi Yang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Centre for Dielectric Research & Shaanxi Engineering Research Centre of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Arshad Saleem Bhatti
- Center for Micro and Nano Device, Department of Physics, COMSATS Institute of Information Technology, Islamabad 44500, Pakistan
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12
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Zhang L, Yuan F, Jiao B, Dong H, Li J, Wu Z. Exploiting a Multiphase Pure Formamidinium Lead Perovskite for Efficient Green-Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:23067-23073. [PMID: 33970596 DOI: 10.1021/acsami.1c00116] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Formamidinium (FA)-based perovskites have demonstrated excellent advances in optoelectronics recently, but in terms of perovskite compounds, the optimal condition of their composition optimization remains controversial. Herein, we boosted the performance of perovskite light-emitting diodes (PeLEDs) in both efficiency and stability through composition and phase engineering. The low-dimensional FA2PbBr4 particles emerged and mixed with the FAPbBr3 composites when the FABr content is excessive. By regulating the phase composition in multiphase FAPbBr3 perovskites, the maximum external quantum efficiency (EQEmax) of optimal PeLEDs (5.14%) is 2.7-fold higher than that of pure FAPbBr3-based PeLEDs (1.90%), and device stability is improved. Further optimizing the film quality and emission efficiency with Rb+ ions, the EQEmax of PeLEDs can be increased to 6.01%, with a half-lifetime of about 185 s under the high current density. This strategy of phase composition optimization in FA-based perovskites provides an effective way to process high-efficiency and stable PeLEDs.
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Affiliation(s)
- Lin Zhang
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Fang Yuan
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Bo Jiao
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hua Dong
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jingrui Li
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zhaoxin Wu
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
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Ji Y, Wang M, Yang Z, Qiu H, Padhiar MA, Zhou Y, Wang H, Dang J, Gaponenko NV, Bhatti AS. Trioctylphosphine-Assisted Pre-protection Low-Temperature Solvothermal Synthesis of Highly Stable CsPbBr 3/TiO 2 Nanocomposites. J Phys Chem Lett 2021; 12:3786-3794. [PMID: 33847498 DOI: 10.1021/acs.jpclett.1c00693] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lead halide perovskite quantum dots (PQDs) are reported as a promising branch of perovskites, which have recently emerged as a field in luminescent materials research. However, before the practical applications of PQDs can be realized, the problem of poor stability has not yet been solved. Herein, we propose a trioctylphosphine (TOP)-assisted pre-protection low-temperature solvothermal synthesis of highly stable CsPbBr3/TiO2 nanocomposites. Due to the protection of branched ligands and the lower temperature of shell formation, these TOP-modified CsPbBr3 PQDs are successfully incorporated into a TiO2 monolith without a loss of fluorescence intensity. Because the excellent nature of both parent materials is preserved in CsPbBr3/TiO2 nanocomposites, it is found that the as-prepared CsPbBr3/TiO2 nanocomposites not only display excellent photocatalytic activity but also yield improved PL stability, enabling us to build highly stable white light-emitting diodes and to photodegrade rhodamine B.
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Affiliation(s)
- Yongqiang Ji
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Minqiang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zhi Yang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hengwei Qiu
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
- Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China
| | - Muhammad Amin Padhiar
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yun Zhou
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hui Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jialin Dang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Nikolai V Gaponenko
- Belarusian State University of Informatics and Radioelectronics, P. Browki St.6, 220013 Minsk, Belarus
| | - Arshad Saleem Bhatti
- Centre for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad 44500, Pakistan
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14
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Zhang J, Yin C, Yang F, Yao Y, Yuan F, Chen H, Wang R, Bai S, Tu G, Hou L. Highly Luminescent and Stable CsPbI 3 Perovskite Nanocrystals with Sodium Dodecyl Sulfate Ligand Passivation for Red-Light-Emitting Diodes. J Phys Chem Lett 2021; 12:2437-2443. [PMID: 33661637 DOI: 10.1021/acs.jpclett.1c00008] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
CsPbI3 perovskite nanocrystals (NCs) have recently emerged as promising materials for optoelectronic devices because of their superior properties. However, the poor stability of the CsPbI3 NCs induced by easy ligand desorption represents a key issue limiting their practical applications. Herein, we report stable and highly luminescent black-phase CsPbI3 NCs passivated by novel ligands of sodium dodecyl sulfate (SDS). Theoretical calculation results reveal a stronger adsorption energy of SDS molecules at the CsPbI3 surface than that of commonly used oleic acid. As a result, the defect formation caused by the ligand loss during the purification process is greatly suppressed. The optimized SDS-CsPbI3 NCs exhibit significantly reduced surface defects, much enhanced stability, and superior photoluminescence efficiency. The red perovskite light-emitting diodes based on the SDS-CsPbI3 NCs demonstrate an external quantum efficiency of 8.4%, which shows a 4-fold improvement compared to the devices based on the oleic acid-modified CsPbI3 NCs.
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Affiliation(s)
- Jibin Zhang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou 510632, P. R. China
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping SE-58183, Sweden
| | - Chunyang Yin
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping SE-58183, Sweden
| | - Fei Yang
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Yuan Yao
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
- Huazhong Institute of Electro-Optics-Wuhan National Laboratory for Optoelectronics, Wuhan 430223, P. R. China
| | - Fanglong Yuan
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping SE-58183, Sweden
| | - Hongting Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou 510632, P. R. China
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping SE-58183, Sweden
| | - Rongwen Wang
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Sai Bai
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping SE-58183, Sweden
- State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027, P. R. China
| | - Guoli Tu
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Lintao Hou
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou 510632, P. R. China
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15
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Ji Y, Wang M, Yang Z, Qiu H, Wang H, Padhiar MA, Zhou Y, Dang J, Gaponenko NV, Bhatti AS. A versatile approach for shape-controlled synthesis of ultrathin perovskite nanostructures. Dalton Trans 2021; 50:3308-3314. [DOI: 10.1039/d0dt04203j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate that ultrathin CsPbBr3 nanostructures can be obtained by a simple mixing of precursor–ligand complexes under ambient conditions.
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16
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Padhiar MA, Wang M, Ji Y, Zhou Y, Qiu H, Yang Z. Stable near white light emission in CsPbCl3 perovskite quantum dots by incorporating Al3+/Mn2+ ions. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/abcf8e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
All inorganic cesium lead halides (CsPbX3, X = Cl, Br, I) are promising materials and have been developed in recent years for various optoelectronic devices and applications because of their excellent optoelectronic properties. Regardless of their excellent characteristics their stability is still uncertain and it is challenging task to obtain stable emission in CsPbX3 perovskite quantum dots (PQDs), hence limiting their practical optoelectronic application. In this context, several approaches have been used like an-ion exchange, ion doping, and core–shell structure to enhance PQDs stability. Herein, we synthesized dual ion co-doped Al3+/Mn2+ CsPbCl3 PQDs for stable light emitting diodes through traditional hot injection method for the first time. By adjusting molar concentration of Al3+/Mn2+ CsPbCl3, co-doped PQDs were successfully prepared. The co-doped PQDs exhibit tunable emission, covering a wide range under UV excitation. Moreover, these high luminescent co-doped PQDs were used to fabricate WLEDs, displaying stable near white light emission with the chromaticity coordination at (0.35, 0.28). Some new evidence has emerged, although some aspects of Mn2+ and Al3+ doping are considered to be consistent with previous conclusions. This viewpoint incorporates all of these details and focuses on the path of transition metal ion doping to perovskite nanostructures and offers an overview for possible potential studies.
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17
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Ji Y, Wang M, Yang Z, Qiu H, Kou S, Padhiar MA, Bhatti AS, Gaponenko NV. Pressure-Driven Transformation of CsPbBrI 2 Nanoparticles into Stable Nanosheets in Solution through Self-Assembly. J Phys Chem Lett 2020; 11:9862-9868. [PMID: 33170699 DOI: 10.1021/acs.jpclett.0c02747] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Very recently, two-dimensional (2D) perovskite nanosheets (PNSs), taking the advantages of perovskite as well as the 2D structure properties, have received an enormous level of interest throughout the scientific community. In spite of this incredible success in perovskite nanocrystals (NCs), self-assembly of many nanostructures in metal halide perovskites has not yet been realized, and producing highly efficient red-emitting PNSs remains challenging. In this Letter, we show that by using CsPbBrI2 perovskite nanoparticles (NPs) as a building block, PNSs can emerge spontaneously under high ambient pressure via template-free self-assembly without additional complicated operation. It is found that the formation of PNSs is ascribed to the high pressure that provides the driving force for the alignment of NPs in solution. Because of the disappearance of the grain boundaries between the adjacent NPs and increased crystallinity, these PNSs self-assembled from NPs exhibit enhanced properties compared to the initial NPs, including higher PL intensity and remarkable chemical stability toward light and water.
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Affiliation(s)
- Yongqiang Ji
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Minqiang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Zhi Yang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Hengwei Qiu
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Song Kou
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Muhammad Amin Padhiar
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research, Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, 710049 Xi'an, China
| | - Arshad Saleem Bhatti
- Centre for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad 44500, Pakistan
| | - Nikolai V Gaponenko
- Belarusian State University of Informatics and Radioelectronics, P. Browki St. 6, 220013 Minsk, Belarus
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