ZnO-PCBM bilayers as electron transport layers in low-temperature processed perovskite solar cells

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2018,（6）
• 页码范围: 343-348
• 页数: 6页
• 语种: 英文

摘要

We investigate an electron transport bilayer fabricated at ＜110 ℃ to form all low-temperature processed,thermally stable,efficient perovskite solar cells with negligible hysteresis.The components of the bilayer create a symbiosis that results in improved devices compared with either of the components being used in isolation.A sol-gel derived ZnO layer facilitates improved energy level alignment and enhanced charge carrier extraction and a [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) layer to reduce hysteresis and enhance perovskite thermal stability.The creation of a bilayer structure allows materials that are inherently unsuitable to be in contact with the perovskite active layer to be used in efficient devices through simple surface modification strategies.