Azmi, Randi Hwang, Sunbin Yin, Wenping Kim, Tae-Wook Ahn, Tae Kyu Jang, Sung-Yeon 2024-01-19T22:33:44Z 2024-01-19T22:33:44Z 2021-09-03 2018-06 2380-8195 https://pubs.kist.re.kr/handle/201004/121337 Herein, we achieved, air-stable low-temperature processed PSC (L-PSC) using alkali-metal modified ZnO ETLs. Using a simple chemical alkali-metal modification method, the surface defects of the ZnO were effectively passivated. As a result, the interfacial decomposition reactions were suppressed, while raising the Fermi energy level and enhancing electron mobility. The improved interfacial charge transfer and internal electric field in the developed L-PSC using K modified ZnO (ZnO-K) exhibited an improved power conversion efficiency (PCE) of 19.90% with negligible hysteresis, while a pristine ZnO based L-PSC exhibited a PCE of 16.10% with significant hysteresis. The ZnO-K based L-PSC also exhibited remarkably higher long-term air-storage stability (91% retention after 800 h) than pristine ZnO based L-PSCs (36% retention after 800 h) due to the suppressed decomposition reactions. The PCE and air stability of our L-PSC with the modified ZnO are among the highest reported for PSCs processed at <= 150 degrees C. English AMER CHEMICAL SOC PHOTOVOLTAIC PERFORMANCE PASSIVATION STABILITY OXIDE High Efficiency Low-Temperature Processed Perovskite Solar Cells Integrated with Alkali Metal Doped ZnO Electron Transport Layers Article 10.1021/acsenergylett.8b00493 1 ACS ENERGY LETTERS, v.3, no.6, pp.1241 - 1246 ACS ENERGY LETTERS 3 6 1241 1246 scie scopus 000435159000005 2-s2.0-85046531124 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article PHOTOVOLTAIC PERFORMANCE PASSIVATION STABILITY OXIDE Perovskite Solar Cells