Wide Temperature Range, Air Stable, Transparent, and Self-Powered Photodetectors Enabled by a Hybrid Film of Graphene and Single-Walled Carbon Nanotubes

Transparent photovoltaic devices (TPVDs) have attracted increasing attention in emerging electronic devices. As the application scenarios extend, there raise higher requirements regarding the stability and operating temperature range of TPVDs. In this work, a unique preparation strategy is proposed for air stable TPVD with a wide operating temperature range, i.e., a nanoscale architecture termed as H-TPVD is constructed that integrates a free-standing and highly transparent conductive hybrid film of graphene and single-walled carbon nanotubes (G-SWNT TCF for short) with a metal oxide NiO/TiO2 heterojunction. The preparation approach is suitable for scaling up. Thanks to the excellent transparent conductivity of the freestanding G-SWNT hybrid film and the ultrathin NiO/TiO2 heterojunction (100 nm), H-TPVD selectively absorbs the ultraviolet (UV) band of sunlight and has a transparency of up to 71