Overcoming photovoltage deficitvianatural amino acid passivation for efficient perovskite solar cells and modules
| Autor: | Tingting Shi, Christoph J. Brabec, Yijun Chen, Yaohua Mai, Xin Xu, Yousheng Wang, Jinlong Hu, Boyuan Cai, Zhen Wang, Shaohang Wu, Xiao-Fang Jiang, Fei Guo |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Passivation Renewable Energy Sustainability and the Environment Photovoltaic system 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Molecule ddc:530 General Materials Science Grain boundary Triiodide 0210 nano-technology Guanidine Layer (electronics) Perovskite (structure) |
| Zdroj: | Journal of materials chemistry / A 9(9), 5857-5865 (2021). doi:10.1039/D0TA12342K |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/d0ta12342k |
| Popis: | Electronic defects at grain boundaries and surfaces of perovskite crystals impair the photovoltaic performance and stability of solar devices. In this work, we report the compensation of photovoltage losses in blade-coated methylammonium lead triiodide (MAPbI3) devices via passivation with natural amino acid (NAA) molecules. We found that the optoelectronic properties of NAA-passivated perovskite films and the corresponding device performances are closely correlated with the molecular interaction strength. A side-by-side comparative study of four typical NAAs reveals that arginine (Arg) functionalized with a guanidine end group exhibits optimum passivation effects owing to the strongest coordinative bonding with the uncoordinated Pb2+, which markedly suppresses the detrimental antisite PbI deep level defects. As a result, nonradiative charge recombination is significantly reduced, resulting in a substantially increased open-circuit voltage (VOC) of 1.17 V and a high efficiency of 20.49%. A solar module with an active area of 10.08 cm2 is also fabricated, yielding an efficiency of 15.65% with negligible VOC losses. In parallel, the Arg-passivated solar devices exhibit enhanced operational stability due to the formation of a hydrophilic Arg protective layer which encapsulates the perovskite crystals. |
| Databáze: | OpenAIRE |
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