Defect Passivation of Organic–Inorganic Hybrid Perovskites by Diammonium Iodide toward High-Performance Photovoltaic Devices

Zhao, Ting; Chueh, Chu-Chen; Chen, Qi; Rajagopal, Adharsh; Jen, Alex K. -Y.

doi:10.1021/acsenergylett.6b00327

Title: Defect Passivation of Organic–Inorganic Hybrid Perovskites by Diammonium Iodide toward High-Performance Photovoltaic Devices

Journal Article · Sun Sep 11 20:00:00 EDT 2016 · ACS Energy Letters

DOI: https://doi.org/10.1021/acsenergylett.6b00327 · OSTI ID:1343582

Zhao, Ting ^[1]; Chueh, Chu-Chen ^[2]; Chen, Qi ^[2]; Rajagopal, Adharsh ^[2]; Jen, Alex K. -Y. ^[3]

Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering; University of Washington
Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering
Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering; Univ. of Washington, Seattle, WA (United States). Dept. of Chemistry

The polycrystalline feature of solutionprocessed perovskite film and its ionic nature inevitably incur substantial crystallographic defects, especially at the film surface and the grain boundaries (GBs). Here, a simple defect passivation method was exploited by post-treating CH₃NH₃PbI₃ (MAPbI₃) film with a rationally selected diammonium iodide. The molecular structure of the used diammonium iodide was discovered to play a critical role in affecting the phase purity of treated MAPbI₃. Both NH₃I(CH₂)₄NH₃I and NH₃I(CH₂)₂O(CH₂)₂NH₃I (EDBE) induce three-dimensional (3D) to two-dimensional (2D) perovskite phase transformation during the treatment while only NH₃I(CH₂)₈NH₃I (C₈) successfully passivates perovskite surface and GBs without forming 2D perovskite because of the elevated activation energy arising from its unique anti-gauche isomerization. In conclusion, defect passivation of MAPbI₃ was clearly confirmed by scanning Kelvin probe microscopy (SKPM) and time-resolved photoluminescence (TRPL) studies, which results in the reduced recombination loss in derived devices. Consequently, the perovskite solar cell with C₈ passivation showed a much improved power conversion efficiency (PCE) of 17.60% compared to the control device PCE of 14.64%.

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Research Organization:: Univ. of Washington, Seattle, WA (United States)

Sponsoring Organization:: Asian Office of Aerospace R&D; National Science Foundation (NSF); Office of Naval Research; USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Contributing Organization:: Boeing-Johnson Foundation; Collaborative Innovation Center of Suzhou Nano Science and Technology

Grant/Contract Number:: EE0006710

OSTI ID:: 1343582

Report Number(s):: DOE-UW-Jen--16

Journal Information:: ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 4 Vol. 1; ISSN 2380-8195

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Perovskite precursor solution chemistry: from fundamentals to photovoltaic applications Jung, Minsu; Ji, Sang-Geun; Kim, Gwisu Chemical Society Reviews, Vol. 48, Issue 7 https://doi.org/10.1039/c8cs00656c	journal	January 2019
Imperfections and their passivation in halide perovskite solar cells Chen, Bo; Rudd, Peter N.; Yang, Shuang Chemical Society Reviews, Vol. 48, Issue 14 https://doi.org/10.1039/c8cs00853a	journal	January 2019
Improving the stability and performance of perovskite solar cells via off-the-shelf post-device ligand treatment Zhang, Hong; Ren, Xingang; Chen, Xiwen Energy & Environmental Science, Vol. 11, Issue 8 https://doi.org/10.1039/c8ee00580j	journal	January 2018
Slow surface passivation and crystal relaxation with additives to improve device performance and durability for tin-based perovskite solar cells Jokar, Efat; Chien, Cheng-Hsun; Fathi, Amir Energy & Environmental Science, Vol. 11, Issue 9 https://doi.org/10.1039/c8ee00956b	journal	January 2018
Highly efficient planar perovskite solar cells achieved by simultaneous defect engineering and formation kinetic control Cheng, Jiaqi; Zhang, Hong; Zhang, Shaoqing Journal of Materials Chemistry A, Vol. 6, Issue 46 https://doi.org/10.1039/c8ta08819e	journal	January 2018
Introducing optically polarizable molecules into perovskite solar cells by simultaneously enhanced spin–orbital coupling, suppressed non-radiative recombination and improved transport balance towards enhancing photovoltaic actions Han, Changfeng; Yu, Haomiao; Duan, Jiashun Journal of Materials Chemistry C, Vol. 6, Issue 23 https://doi.org/10.1039/c8tc01033a	journal	January 2018
An interface stabilized perovskite solar cell with high stabilized efficiency and low voltage loss Yoo, Jason J.; Wieghold, Sarah; Sponseller, Melany C. Energy & Environmental Science, Vol. 12, Issue 7 https://doi.org/10.1039/c9ee00751b	journal	January 2019
Broadband white light emission from one-dimensional zigzag edge-sharing perovskite Jung, Mi-Hee New Journal of Chemistry, Vol. 44, Issue 1 https://doi.org/10.1039/c9nj04758a	journal	January 2020
Interface modification by a multifunctional ammonium salt for high performance and stable planar perovskite solar cells Wang, Shuo; Zhu, Yu; Wang, Chengyan Journal of Materials Chemistry A, Vol. 7, Issue 19 https://doi.org/10.1039/c9ta02631b	journal	January 2019
Bifunctional π-conjugated ligand assisted stable and efficient perovskite solar cell fabrication via interfacial stitching Wei, Feijie; Jiao, Bo; Dong, Hua Journal of Materials Chemistry A, Vol. 7, Issue 27 https://doi.org/10.1039/c9ta03898a	journal	January 2019
Potassium ions as a kinetic controller in ionic double layers for hysteresis-free perovskite solar cells Kim, Seul-Gi; Li, Cheng; Guerrero, Antonio Journal of Materials Chemistry A, Vol. 7, Issue 32 https://doi.org/10.1039/c9ta07595j	journal	January 2019
Interfacial crosslinked quasi-2D perovskite with boosted carrier transport and enhanced stability Zhang, Taiyang; Hui, Yong; Chen, Liang Journal of Physics D: Applied Physics, Vol. 51, Issue 40 https://doi.org/10.1088/1361-6463/aad7de	journal	August 2018
Efficient, stable solar cells by using inherent bandgap of α-phase formamidinium lead iodide Min, Hanul; Kim, Maengsuk; Lee, Seung-Un Science, Vol. 366, Issue 6466 https://doi.org/10.1126/science.aay7044	journal	November 2019
Imperfections and their passivation in halide perovskite solar cells J., Huang,; B., Chen,; P. N., Rudd, The University of North Carolina at Chapel Hill University Libraries https://doi.org/10.17615/kzq8-3k31	text	January 2019
Analysing the Prospects of Perovskite Solar Cells within the Purview of Recent Scientific Advancements Bhat, Aakash; Dhamaniya, Bhanu; Chhillar, Priyanka Crystals, Vol. 8, Issue 6 https://doi.org/10.3390/cryst8060242	journal	June 2018

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