Choi Jun, Park Young Ki, Lee Hee Dong, Hong Seok Il, Lee Woosung, Jung Jae Woong
Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan-si 15588, Gyeonggi-do, Korea.
Advanced Textile R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan-si 15588, Gyeonggi-do, Korea.
Nanomaterials (Basel). 2021 Nov 16;11(11):3090. doi: 10.3390/nano11113090.
A robust electron transport layer (ETL) is an essential component in planar-heterojunction perovskite solar cells (PSCs). Herein, a sol-gel-driven ZrSnO thin film is synthesized and its optoelectronic properties are systematically investigated. The optimized processing conditions for sol-gel synthesis produce a ZrSnO thin film that exhibits high optical transmittance in the UV-Vis-NIR range, a suitable conduction band maximum, and good electrical conductivity, revealing its potential for application in the ETL of planar-heterojunction PSCs. Consequently, the ZrSnO ETL-based devices deliver promising power conversion efficiency (PCE) up to 19.05% from CHNHPbI-based planar-heterojunction devices. Furthermore, the optimal ZrSnO ETL also contributes to decent long-term stability of the non-encapsulated device for 360 h in an ambient atmosphere (~25 °C, ~55%,), suggesting great potential of the sol-gel-driven ZrSnO thin film for a robust solution-processed ETL material in high-performance PSCs.
坚固的电子传输层（ETL）是平面异质结钙钛矿太阳能电池（PSC）的重要组成部分。在此，合成了一种溶胶 - 凝胶驱动的ZrSnO薄膜，并系统地研究了其光电性能。溶胶 - 凝胶合成的优化工艺条件产生了一种ZrSnO薄膜，该薄膜在紫外 - 可见 - 近红外范围内表现出高光学透过率、合适的导带最大值和良好的导电性，揭示了其在平面异质结PSC的ETL中应用的潜力。因此，基于ZrSnO ETL的器件从基于CHNHPbI的平面异质结器件中实现了高达19.05%的有前景的功率转换效率（PCE）。此外，最佳的ZrSnO ETL还有助于非封装器件在环境气氛（25°C，55%）中360小时的良好长期稳定性，表明溶胶 - 凝胶驱动的ZrSnO薄膜在高性能PSC中作为坚固的溶液处理ETL材料具有巨大潜力。
