Kyushu Institute of Technology Academic Repository
Kyutacarは九州工業大学で生産された研究成果を オープンアクセスで提供する機関リポジトリシステムです。 Kyutacar is open-access repository of research by members of the Kyushu Institute of Technology.
Graduate School of Life Science and Systems Engineering Institution, Kyushu Institute of Technology, Kitakyushu, 808-0196 Japan
Graduate School of Life Science and Systems Engineering Institution, Kyushu Institute of Technology, Kitakyushu, 808-0196 Japan
Graduate School of Life Science and Systems Engineering Institution, Kyushu Institute of Technology, Kitakyushu, 808-0196 Japan
Graduate School of Life Science and Systems Engineering Institution, Kyushu Institute of Technology, Kitakyushu, 808-0196 Japan
Graduate School of Life Science and Systems Engineering Institution, Kyushu Institute of Technology, Kitakyushu, 808-0196 Japan
Department Graduate School of Informatics and Engineering, University of Electro-Communications, Chofu, Tokyo, 182-8585 Japan
Department Graduate School of Informatics and Engineering, University of Electro-Communications, Chofu, Tokyo, 182-8585 Japan
Graduate School of Life Science and Systems Engineering Institution, Kyushu Institute of Technology, Kitakyushu, 808-0196 Japan
抄録
01 August Compared with organic‐inorganic perovskites, all‐inorganic cesium‐based perovskites without volatile organic compounds have gained extensive interests because of the high thermal stability. However, they have a problem on phase transition from cubic phase (active for photo‐electric conversion) to orthorhombic phase (inactive for photo‐electric conversion) at room temperature, which has hindered further progress. Herein, novel inorganic CsPb1−xGexI2Br perovskites were prepared in humid ambient atmosphere without a glovebox. The phase stability of the all‐inorganic perovskite was effectively enhanced after germanium addition. In addition, the highest power conversion efficiency of 10.8 % with high open‐circuit voltage (VOC) of 1.27 V in a planar solar cell based on CsPb0.8Ge0.2I2Br perovskite was achieved. Furthermore, the highest VOC up to 1.34 V was obtained by CsPb0.7Ge0.3I2Br perovskite, which is a remarkable record in the field of all‐inorganic perovskite solar cells. More importantly, all the photovoltaic parameters of CsPb0.8Ge0.2I2Br perovskite solar cells showed nearly no decay after 7 h measurement in 50–60 % relative humidity without encapsulation.
All‐Inorganic CsPb1−xGexI2Br Perovskite with Enhanced Phase Stability and Photovoltaic Performance
anie.201807270.pdf
(2.43MB)
