Tailoring Crystal Structure of FA0.83Cs0.17PbI3 Perovskite Through Guanidinium Doping for Enhanced Performance and Tunable Hysteresis of Planar Perovskite Solar Cells
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Other documents of the author: Duy Pham, Ngoc; Zhang, Chunmei; Tiong, Vincent Tiing; Zhang, Shengli; Will, Geoffrey; Bou, Agustín; Bisquert, Juan; Shaw, Paul E.; Du, Aijun; Wilson, Gregory J; Wang, Hongxia
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comunitat-uji-handle2:10234/160292
comunitat-uji-handle3:10234/160293
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https://doi.org/10.1002/adfm.201806479 |
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Title
Tailoring Crystal Structure of FA0.83Cs0.17PbI3 Perovskite Through Guanidinium Doping for Enhanced Performance and Tunable Hysteresis of Planar Perovskite Solar CellsAuthor (s)
Date
2019Publisher
WileyISSN
1616-301X; 1616-3028Bibliographic citation
PHAM, Ngoc Duy, et al. Tailoring crystal structure of FA0. 83Cs0. 17PbI3 perovskite Through guanidinium doping for Enhanced performance and Tunable hysteresis of planar perovskite solar cells. Advanced Functional Materials, 2019, vol. 29, no 1, p. 1806479Type
info:eu-repo/semantics/articlePublisher version
https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201806479Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
Current-voltage hysteresis of perovskite solar cells (PSCs) has raised the concern of accurate performance measurement in practice. Although various theories have been proposed to elucidate this phenomenon, the origin ... [+]
Current-voltage hysteresis of perovskite solar cells (PSCs) has raised the concern of accurate performance measurement in practice. Although various theories have been proposed to elucidate this phenomenon, the origin of hysteresis is still an open question. Herein, the use of guanidinium cation (Gu(+))-dopant is demonstrated to tailor the crystal structure of mixed-cation formamidinium-cesium lead triiodide (FA(0.83)Cs(0.17)PbI(3)) perovskite, resulting in an improved energy conversion efficiency and tunable current-voltage hysteresis characteristic in planar solar cells. Particularly, when the concentration of Gu-dopant for the perovskite film increases, the normal hysteresis initially observed in the pristine PSC is first suppressed with 2%-Gu-dopant, then changed to inverted hysteresis with a higher Gu-dopant. The hysteresis tunability behavior is attributed to the interplay of charge/ion accumulation and recombination at interfaces in the PSC. Furthermore, compared to the cell without Gu(+)-dopant, the optimal content of 2% Gu(+)-dopant also increases the device efficiency by 14%, reaching over 17% under one sun illumination. [-]
Is part of
Advanced Functional Materials, 2019, vol. 29, no 1Investigation project
Australian Research Council Future Fellowship: FT120100674; Queensland-Chinese Academy of Science (Q-CAS) collaborative research fund; Science and Engineering faculty, QUTRights
Copyright © John Wiley & Sons, Inc.
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