Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 9, Issue 9, Pages 2411-2417Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.8b00323
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Funding
- National Natural Science Foundation of China (NSFC) [U1432106, 21550110188]
- Soochow University-Western University Center for Synchrotron Radiation Research
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University
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Organometallic lead halide perovskites seem to be on the threshold of becoming viable commercial photovoltaics; however, further improvements to the stability of these materials must be made before they can compete with existing photovoltaic technologies. Of the organometallic lead halide perovskites used in photovoltaics, methyl ammonium lead triiodide perovskite (MAPI) is perhaps the most studied, and understanding how MAPI degrades is crucial for developing strategies to improve stability. We discuss the experimental evidence behind several possible routes for MAPI to degrade into PbI2 and various organics, and how the decomposition path of MAPI may strongly depend on substrate, precursors, intrinsic organic defects, and morphology. Exploring the conditions required for MAPI to degrade according to a particular pathway is important not only from a fundamental materials chemistry perspective, but also for understanding intrinsic instability in MAPI-based photovoltaics and to develop strategies to improve stability.
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