DataVXACS Energy LettersPaper
journal article·2020-01-10

Chemical Composition and Phase Evolution in DMAI-Derived Inorganic Perovskite Solar Cells

Hongguang Meng, Zhipeng Shao, Li Wang, Zhipeng Li, Ranran Liu, Yingping Fan, Guanglei Cui, Shuping Pang

ACS Energy Letters· Volume 5· Issue 1
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Source abstract

Abstract

Inorganic CsPbI3 is promising to enhance the thermal stability of perovskite solar cells. The dimethylamine iodide (DMAI) derived method is currently the most efficient way to achieve high efficiency, but the effect of DMAI has not been fully explained. Herein, the chemical composition and phase evolution of the mixed DMAI/CsPbI3 layer during thermal treatment has been studied. The results demonstrate that, with the common DMAI/CsI/PbI2 recipe in DMSO solvent, a mixed perovskite DMA0.15Cs0.85PbI3 is first formed through a solid reaction between DMAPbI3 and Cs4PbI6. Further thermal treatment will transform the mixed perovskite phase directly to γ-CsPbI3 and then spontaneously convert to δ-CsPbI3. It has been also demonstrated that the DMA0.15Cs0.85PbI3 phase is thermodynamically stable and shows a bandgap of 1.67 eV, which is narrower than 1.73 eV of γ-CsPbI3. The device efficiency of the mixed DMA0.15Cs0.85PbI3 perovskite is therefore highly improved in comparison with the pure inorganic γ-CsPbI3 perovskite.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, People’s Republic of China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China

Qingdao University of Science and Technology, Qingdao 266042, People’s Republic of China

Dalian National Laboratory for Clean Energy, Dalian 116023, People’s Republic of China

Funding

Shandong Province · National Natural Science Foundation of China · Natural Science Foundation of Shandong Province · Qingdao Key Laboratory of Solar Energy Utilization and Energy Storage Technology · Dalian National Laboratory for Clean Energy

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