Journal article
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, Vol.29(1), pp.1-10
2019
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 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 (FA0.83Cs0.17PbI3) 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.
Details
- Title
- Tailoring Crystal Structure of FA0.83Cs0.17PbI3 Perovskite Through Guanidinium Doping for Enhanced Performance and Tunable Hysteresis of Planar Perovskite Solar Cells
- Authors
- Ngoc Duy Pham (Author) - Queensland University of TechnologyChunmei Zhang (Author) - Queensland University of TechnologyVincent Tiing Tiong (Author) - Queensland University of TechnologyShengli Zhang (Author) - Queensland University of TechnologyGeoffrey Will (Author) - Queensland University of TechnologyAgustín Bou (Author) - Universitat Jaume IJuan Bisquert (Author) - Universitat Jaume IPaul E. Shaw (Author) - University of QueenslandAijun Du (Author) - Queensland University of TechnologyGregory J Wilson (Author) - CSIRO Energy CentreHongxia Wang (Corresponding Author) - Queensland University of Technology
- Publication details
- Advanced Functional Materials, Vol.29(1), pp.1-10
- Publisher
- Wiley-VCH Verlag GmbH & Co. KGaA
- DOI
- 10.1002/adfm.201806479
- ISSN
- 1616-3028
- Grant note
- Australian Research Council Future Fellowship (FT120100674) Queensland‐Chinese Academy of Science
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99737879202621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter
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