title: Thermally Stable Mesoporous Perovskite Solar Cells Incorporating Low-Temperature Processed Graphene/Polymer Electron Transporting Layer.
abstract: In the short time since its discovery, perovskite solar cells (PSCs) have attained high power conversion efficiency but their lack of thermal stability remains a barrier to commercialization. Among the experimentally accessible parameter spaces for optimizing performance, identifying an electron transport layer (ETL) that forms a thermally stable interface with perovskite and which is solution-processable at low-temperature will certainly be advantageous. Herein, we developed a mesoporous graphene/polymer composite with these advantages when used as ETL in CH3NH3PbI3PSCs, and a high efficiency of 13.8% under AM 1.5G solar illumination could be obtained. Due to the high heat transmission coefficient and low isoelectric point of mesoporous graphene-based ETL, the PSC device enjoys good chemical and thermal stability. Our work demonstrates that the mesoporous graphene-based scaffold is a promising ETL candidate for high performance and thermally stable PSCs.
authors.affiliation: Department of Chemistry and Centre for Advanced 2D Materials, National University of Singapore , 3 Science Drive 3, Singapore 119260.
authors.forename: Shi Wun
authors.initials: SW
authors.lastname: Tong
authors.forename: Janardhan
authors.initials: J
authors.lastname: Balapanuru
authors.affiliation: Department of Chemistry and Centre for Advanced 2D Materials, National University of Singapore , 3 Science Drive 3, Singapore 119260.
authors.forename: Deyi
authors.initials: D
authors.lastname: Fu
authors.affiliation: Department of Chemistry and Centre for Advanced 2D Materials, National University of Singapore , 3 Science Drive 3, Singapore 119260.|SinBeRISE CREATE, National Research Foundation, CREATE Tower, 1 Create Way, 138602, Singapore.
authors.forename: Kian Ping
authors.initials: KP
authors.lastname: Loh
keywords: electron transport layer; graphene; low temperature; mesoporous; perovskite solar cells; polymer