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Title: Simultaneously boost diffusion length and stability of perovskite for high performance solar cells
Authors: Liang, Chao
Zhao, Dandan
Li, Pengwei
Wu, Bo
Gu, Hao
Zhang, Jiacheng
Goh, Teck Wee
Chen, Shi
Chen, Yonghua
Sha, Zhendong
Shao, Guosheng
Sum, Tze Chien
Xing, Guichuan
Keywords: Science::Physics::Optics and light
Issue Date: 2019
Source: Liang, C., Zhao, D., Li, P., Wu, B., Gu, H., Zhang, J., . . . Xing, G. (2019). Simultaneously boost diffusion length and stability of perovskite for high performance solar cells. Nano Energy, 59, 721-729. doi:10.1016/j.nanoen.2019.03.029
Project: Macau Science and Technology Development Funds (FDCT-116/2016/A3, FDCT-091/2017/A2, FDCT-014/2017/AMJ)
Macau Research Grants (SRG2016-00087-FST, MYRG2018-00148-IAPME) from University of Macau
Natural Science Foundation of China (91733302, 61605073, 2015CB932200)
Young 1000 Talents Global Recruitment Program of China
JSPS-NTU Joint Research Project M4082176
Ministry of Education AcRF Tier 2 grants MOE2015-T2-2-015, MOE2016-T2-1-034, MOE2017-T2-1-110 and MOE2017-T2-2-002
NRF Investigatorship Programme NRF-NRFI-2018-04
Journal: Nano Energy
Abstract: Organic-inorganic hybrid metal-halide perovskites, such as methylammonium lead iodide, have emerged as amazing semiconductors with immense potential in thin film photovoltaic owing to their impressive diffusion lengths. However, the instability of these perovskites in ambient air, due to the presence of hydrophilic and volatile organic cation, hinders their further commercialization. Although low-dimensional perovskite solar cells (PSCs) show better stability than conventional three-dimensional (3D) devices, the low power conversion efficiency (PCE) is delivered, due to the decline of carrier mobility and diffusion length. Here, a large organic cation, tert-butylammonium (t-BA), is incorporated into the 3D perovskite, which not only enhances the crystal stability, but also greatly reduces the trap density and improves the mobility of the perovskite film, leading to ∼1.8 μm electron and hole diffusion lengths. High-performance PSCs based on t-BA 0.1 [Cs 0.05 (FA 0.83 MA 0.17 ) 0.95 ] 0.9 Pb(I 0.83 Br 0.17 ) 3 with champion PCEs of 20.62% (19.8% ± 0.4%) for 0.04 cm 2 and 14.54% for 20.8 cm 2 are demonstrated. More importantly, with humidity of 45–55%, the solar cells could sustain 80% of their “post burn-in” PCE after continuous working under light (AM1.5G, 100 mW cm −2 ) in air for 1174 h. This lifetime is 63% longer than that (718 h) of the control Cs 0.05 (FA 0.83 MA 0.17 ) 0.95 Pb(I 0.83 Br 0.17 ) 3 PSCs.
ISSN: 2211-2855
DOI: 10.1016/j.nanoen.2019.03.029
Rights: © 2019 Elsevier. All rights reserved. This paper was published in Nano Energy and is made available with permission of Elsevier.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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