Aminosilane‐Modified CuGaO2 Nanoparticles Incorporated with CuSCN as a Hole‐Transport Layer for Efficient and Stable Perovskite Solar Cells

• DOI: 10.1002/admi.201901372
• Publication Date: 2019-09-18T20:23:45Z
• Authors: Byungho Lee; Alan Jiwan Yun; Jinhyun Kim; Bumjin Gil; Byungha Shin; Byungwoo Park
• Keywords: Spin Coating; Perovskite solar cell; Thermal Stability

Abstract Herein, solution‐processible inorganic hole‐transport layer (HTL) of a perovskite solar cell that consists CuGaO 2 nanoparticles and CuSCN, which leads to an improved device performance as well long‐term stability, is reported. Uniform films are prepared by first treating with aminosilane well‐dispersed solution, followed spin‐coating the suspension. Subsequent CuSCN solution onto forms smooth HTL excellent coverage electrical conductivity. Comparing reference HTL, /CuSCN improves carrier extraction reduces trap density ≈40%, measured photoluminescence capacitance analysis. Excellent thermal stability also demonstrated: ≈80% initial efficiency cells retained after 400 h under 85 °C/85% relative humidity environment.