Enhanced Efficiency and Stability of Planar Perovskite Solar Cells Using a Dual Electron Transport Layer of Gold Nanoparticles Embedded in Anatase TiO 2 Films

作者：Dawei Zhao, Mingyu Yu, Lingling Zheng, Ming Li, Shijie Dai, Di-Chun Chen, Tung‐Chun Lee, Daqin Yun · 发表于：ACS Applied Energy Materials · 年份：2020 · DOI：10.1021/acsaem.0c00276 · 被引用次数：44 · 研究领域：Perovskite Materials and Applications、Quantum Dots Synthesis And Properties、Chalcogenide Semiconductor Thin Films

High Resolution Image Download MS PowerPoint Slide Incorporating plasmonic nanostructures is a promising strategy to enhance both the optical and electrical characteristics of photovoltaic devices via more efficient harvesting of incident light. Herein, we report a facile fabrication scheme at low temperature for producing gold nanoparticles embedded in anatase TiO 2 films, which can simultaneously improve the efficiency and stability of n–i–p planar heterojunction perovskite solar cells (PSCs). The PSCs based on rigid and flexible substrates with 0.2 wt % Au–TiO 2 /TiO 2 dual electron transport layers (ETLs) achieved power conversion efficiencies up to 20.31 and 15.36%, superior to that of devices with TiO 2 as a single ETL. Moreover, 0.2 wt % Au–TiO 2 /TiO 2 devices demonstrated significant stability in light soaking, which is attributed to improved light absorption, low charge recombination loss, and enhanced carrier transport, and extraction with the plasmonic Au–TiO 2 /TiO 2 dual ETL. The present work improves the practicability of high-performance and flexible PSCs by engineering the photogenerated carrier dynamics at the interface.