Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 3, Pages 2403-2409Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b13206
Keywords
pseudohalide; mixed cation; high stability; efficiency; dim-light; perovskite solar cells
Funding
- Ministry of Science and Technology [MOST 105-2623-E-006-002-ET, MOST 104-2119-M-006-004, MOST 103-2221-E-006-029-MY3]
- Research Center for Energy Technology and Strategy (RCETS)
- Advanced Optoelectronic Technology Center (AOTC), National Cheng Kung University
- Top Notch Project under the Headquarter of University Advancement at National Cheng Kung University - Ministry of Education, Taiwan, ROC
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Novel organic inorganic hybrid perovskite compounds composed of mixed A- site cation (Formamidinium and Cesium) and pseudohalides (SCN and I) ions are successfully synthesized. These new classes of hybrid perovskites photovoltaics exhibited remarkable power conversion efficiency of more than 16% with excellent stability against moisture in ambient environment and under low-light storage condition. The existence of SCN- ion inclusion is confirmed by secondary ion mass spectrometry and Fourier transform infrared spectroscopy. The SCN--doped pseudohalide is advantageous for the formation of large perovskite grains, as well as the performance and stability of the device.
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