Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/146990
Title: Excellent intrinsic long‐term thermal stability of co‐evaporated MAPbI₃ solar cells at 85 °C
Authors: Dewi, Herlina Arianita
Li, Jia
Wang, Hao
Chaudhary, Bhumika
Mathews, Nripan
Mhaisalkar, Subodh
Bruno, Annalisa
Keywords: Engineering::Materials
Issue Date: 2021
Source: Dewi, H. A., Li, J., Wang, H., Chaudhary, B., Mathews, N., Mhaisalkar, S. & Bruno, A. (2021). Excellent intrinsic long‐term thermal stability of co‐evaporated MAPbI₃ solar cells at 85 °C. Advanced Functional Materials, 31(22), 2100557-. https://dx.doi.org/10.1002/adfm.202100557
Project: S18‐1176‐SCRP 
NRF2015EWT‐EIRP003‐004 
NRF‐CRP14‐2014‐03 
NRF2018‐ITC001‐001 
Journal: Advanced Functional Materials 
Abstract: Thermal stability is a critical criterion for assessing the long‐term stability of perovskite solar cells (PSCs). Here, it is shown that un‐encapsulated co‐evaporated MAPbI3 (TE_MAPbI₃) PSCs demonstrate remarkable thermal stability even in an n‐i‐p structure that employs Spiro‐OMeTAD as hole transport material (HTM). TE_MAPbI3 PSCs maintain over ≈95% and ≈80% of their initial power conversion efficiency (PCE) after 1000 and 3600 h respectively under continuous thermal aging at 85 °C. TE_MAPbI₃ PSCs demonstrate remarkable structural robustness, absence of pinholes, or significant variation in grain sizes, and intact interfaces with the HTM, upon prolonged thermal aging. Here, the main factors driving TE_MAPbI₃ stability are assessed. It is demonstrated that the excellent TE_MAPbI₃ thermal stability is related to the perovskite growth process leading to a compact and almost strain‐stress‐free film. On the other hand, un‐encapsulated PSCs with the same architecture, but incorporating solution‐processed MAPbI3 or Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3 as active layers, show a complete PCE degradation after 500 h under the same thermal aging condition. These results highlight that the control of the perovskite growth process can substantially enhance the PSCs thermal stability, besides the chemical composition. The TE_MAPbI₃ impressive long‐term thermal stability features the potential for field‐operating conditions.
URI: https://hdl.handle.net/10356/146990
ISSN: 1616-301X
DOI: 10.1002/adfm.202100557
Rights: This is the peer reviewed version of the following article: Dewi, H. A., Li, J., Wang, H., Chaudhary, B., Mathews, N., Mhaisalkar, S. & Bruno, A. (2021). Excellent intrinsic long‐term thermal stability of co‐evaporated MAPbI₃ solar cells at 85 °C. Advanced Functional Materials, 31(22), 2100557-, which has been published in final form at http://doi.org/10.1002/adfm.202100557. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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