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Ma M, Zeng Y, Yang Y, Zhang C, Ma Y, Wu S, Liu C, Mai Y. Dendrimer Modification Strategy Based on the Understanding of the Photovoltaic Mechanism of a Perovskite Device under Full Sun and Indoor Light. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37197996 DOI: 10.1021/acsami.3c02979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The wide-band-gap inorganic CsPbI2Br perovskite material provides a highly matched absorption range with the indoor light spectrum and is expected to be used in the fabrication of highly efficient indoor photovoltaic cells (IPVs) and self-powered low-power Internet of Things (IoT) sensors. However, the defects that cause nonradiative recombination and ion migration are assumed to form leakage loss channels, resulting in a severe impact on the open-circuit voltage (VOC) and the fill factor (FF) of IPVs. Herein, we introduce poly(amidoamine) (PAMAM) dendrimers with multiple passivation sites to fully repair the leakage channels in the devices, taking into account the characteristics of IPVs that are extremely sensitive to nonradiative recombination and shunt resistance. The as-optimized IPVs demonstrate a promising PCE of 35.71% under a fluorescent light source (1000 lux), with VOC increased from 0.99 to 1.06 V and FF improved from 75.21 to 84.39%. The present work provides insight into the photovoltaic mechanism of perovskites under full sun and indoor light, which provides guidance for perovskite photovoltaic technology with industrialization prospects.
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Affiliation(s)
- Mengen Ma
- Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yilin Zeng
- Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yuzhao Yang
- Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Cuiling Zhang
- Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yujiao Ma
- Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
| | - Shaohang Wu
- Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
| | - Chong Liu
- Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yaohua Mai
- Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
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The Progress of Additive Engineering for CH3NH3PbI3 Photo-Active Layer in the Context of Perovskite Solar Cells. CRYSTALS 2021. [DOI: 10.3390/cryst11070814] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Methylammonium lead triiodide (CH3NH3PbI3/MAPbI3) is the most intensively explored perovskite light-absorbing material for hybrid organic–inorganic perovskite photovoltaics due to its unique optoelectronic properties and advantages. This includes tunable bandgap, a higher absorption coefficient than conventional materials used in photovoltaics, ease of manufacturing due to solution processability, and low fabrication costs. In addition, the MAPbI3 absorber layer provides one of the highest open-circuit voltages (Voc), low Voc loss/deficit, and low exciton binding energy, resulting in better charge transport with decent charge carrier mobilities and long diffusion lengths of charge carriers, making it a suitable candidate for photovoltaic applications. Unfortunately, MAPbI3 suffers from poor photochemical stability, which is the main problem to commercialize MAPbI3-based perovskite solar cells (PSCs). However, researchers frequently adopt additive engineering to overcome the issue of poor stability. Therefore, in this review, we have classified additives as organic and inorganic additives. Organic additives are subclassified based on functional groups associated with N/O/S donor atoms; whereas, inorganic additives are subcategorized as metals and non-metal halide salts. Further, we discussed their role and mechanism in terms of improving the performance and stability of MAPbI3-based PSCs. In addition, we scrutinized the additive influence on the morphology and optoelectronic properties to gain a deeper understanding of the crosslinking mechanism into the MAPbI3 framework. Our review aims to help the research community, by providing a glance of the advancement in additive engineering for the MAPbI3 light-absorbing layer, so that new additives can be designed and experimented with to overcome stability challenges. This, in turn, might pave the way for wide scale commercial use.
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Zhang W, Liu X, He B, Zhu J, Li X, Shen K, Chen H, Duan Y, Tang Q. Enhanced Efficiency of Air-Stable CsPbBr 3 Perovskite Solar Cells by Defect Dual Passivation and Grain Size Enlargement with a Multifunctional Additive. ACS APPLIED MATERIALS & INTERFACES 2020; 12:36092-36101. [PMID: 32663398 DOI: 10.1021/acsami.0c08827] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The perovskite solar cells (PSCs) based on cesium lead bromide (CsPbBr3) with outstanding environmental stability and low preparation cost are regarded as one of the most promising photovoltaic devices for commercial applications. However, the performance of CsPbBr3 PSCs can be badly deteriorated by the intense charge recombination arising from the ionic defects at the grain boundaries of perovskite film. To cope with this issue, we adopt an amino acid of l-lysine with two amino and one carboxyl groups as a chemical additive to incorporate into perovskite film to simultaneously anchor the uncoordinated Pb2+ (Cs+) and halogen ion defects. Further, the grain size of CsPbBr3 perovskite is boosted from 688 to over 1000 nm after l-lysine incorporation as a result of the decreased nucleation rate and the sufficient growth of perovskite, which effectively reduce the grain boundaries for load defects. As expected, the optimized device achieves a best power conversion efficiency of 9.69% attributed to the remarkably reduced charge recombination and enhanced charge extraction arising from the efficient defects dual-passivation and enlarged grain size of perovskite film as well as the improved energy level alignment at the device interface after the introduction of l-lysine, which is elevated by 61.23% in comparison to 6.01% efficiency of the pristine one. Moreover, the unencapsulated device with l-lysine incorporation exhibits remarkable long-term stability in air with 80% RH at 25 °C and 0% RH at 80 °C as well as under continuous illumination conditions. This work provides an effective multifunctional additive for imperfection passivation and grain size enlargement of perovskite to build PSCs with high efficiency and stability.
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Affiliation(s)
- Wenyu Zhang
- School of Materials Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, P.R. China
| | - Xiaojie Liu
- School of Materials Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, P.R. China
| | - Benlin He
- School of Materials Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, P.R. China
| | - Jingwei Zhu
- School of Materials Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, P.R. China
| | - Xueke Li
- School of Materials Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, P.R. China
| | - Kaixiang Shen
- School of Materials Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, P.R. China
| | - Haiyan Chen
- School of Materials Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, P.R. China
| | - Yanyan Duan
- State Centre for International Cooperation on Designer Low-Carbon and Environmental Material (SCICDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, P.R. China
| | - Qunwei Tang
- College of Information Science and Technology, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, P.R. China
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