This title appears in the Scientific Report :
2022
Please use the identifier:
http://dx.doi.org/10.1039/D0TA12342K in citations.
Please use the identifier: http://hdl.handle.net/2128/33483 in citations.
Overcoming photovoltage deficit via natural amino acid passivation for efficient perovskite solar cells and modules
Overcoming photovoltage deficit via natural amino acid passivation for efficient perovskite solar cells and modules
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 a...
Saved in:
Personal Name(s): | Hu, Jinlong |
---|---|
Xu, Xin / Chen, Yijun / Wu, Shaohang / Wang, Zhen / Wang, Yousheng / Jiang, Xiaofang / Cai, Boyuan / Shi, Tingting / Brabec, Christoph / Mai, Yaohua / Guo, Fei (Corresponding author) | |
Contributing Institute: |
Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien; IEK-11 |
Published in: | Journal of materials chemistry / A, 9 (2021) 9, S. 5857 - 5865 |
Imprint: |
London [u.a.]
RSC
2021
|
DOI: |
10.1039/D0TA12342K |
Document Type: |
Journal Article |
Research Program: |
Modules, stability, performance and specific applications Cell Design and Development |
Link: |
Published on 2021-01-29. Available in OpenAccess from 2022-01-29. Published on 2021-01-29. Available in OpenAccess from 2022-01-29. Restricted |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/33483 in citations.
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. |