期刊
NANOMATERIALS
卷 10, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/nano10091669
关键词
perovskite solar cell; hole transport layer; CuCrO2 nanoparticles; thermal stability; light stability
类别
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20183010014470]
- National Research Foundation of Korea (NRF) [2020R1A2C100545211]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20183010014470] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
High-mobility inorganic CuCrO2 nanoparticles are co-utilized with conventional poly(bis(4-phenyl)(2,5,6-trimethylphenyl)amine) (PTAA) as a hole transport layer (HTL) for perovskite solar cells to improve device performance and long-term stability. Even though CuCrO2 nanoparticles can be readily synthesized by hydrothermal reaction, it is difficult to form a uniform HTL with CuCrO2 alone due to the severe agglomeration of nanoparticles. Herein, both CuCrO2 nanoparticles and PTAA are sequentially deposited on perovskite by a simple spin-coating process, forming uniform HTL with excellent coverage. Due to the presence of high-mobility CuCrO2 nanoparticles, CuCrO2/PTAA HTL demonstrates better carrier extraction and transport. A reduction in trap density is also observed by trap-filled limited voltages and capacitance analyses. Incorporation of stable CuCrO2 also contributes to the improved device stability under heat and light. Encapsulated perovskite solar cells with CuCrO2/PTAA HTL retain their efficiency over 90% after similar to 900-h storage in 85 degrees C/85% relative humidity and under continuous 1-sun illumination at maximum-power point.
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