| 초록 |
Developing perovskite solar cells toward high-efficiency and low-temperature process has a great potential for the realization of next-generation renewable energy source. ZnO has attracted as promising electron transport layers (ETLs), however, perovskite is prone to easily decompose at the ZnO surface, resulting in the limited photovoltaic performance. Herein, we report interlayer-mediated efficient ETLs with one-step processed perovskite layer. Utilization of interlayer on ZnO prevents direct contact between the perovskite and ETLs, avoiding the destruction of perovskite materials. As a result, our perovskite solar cell employing tailor-designed ETL exhibits maximum power conversion efficiency (PCE) of 15.8 %, which is superior by 25 % higher than that of a control device (12.6 %). We further develop flexible solar cells which exhibit the PCE of 11.9 %. Our strategy paves the way to the realization of high performance, easy-to-process, and large-area perovskite optoelectronics. |
