Large area semitransparent inverted organic solar cells with enhanced operational stability using TiO2 electron transport layer for building integrated photovoltaic devices

Herein, we have demonstrated the semitransparent organic solar cell (OSC) devices in inverted architecture with TiO2 as an electron transport layer (ETL). A comparative study is performed with widely used ZnO ETL based devices. The devices with TiO2 ETL exhibits better device efficiency (2.44%) in comparison to ZnO counterparts (1.94%). The transfer matrix calculations finding indeed validate the experimental results. Furthermore, the large area OSC devices of size 1 cm(2) have been fabricated. The device stability is investigated under operational conditions by measuring time dependent device performance in biased condition at maximum power point. Our findings suggest that the devices fabricated using TiO2 ETL is much more durable as compare to ZnO based devices. (c) 2020 Elsevier B.V. All rights reserved.

Automated summary

The study demonstrates that organic solar cells utilizing TiO2 as the electron transport layer exhibit better device efficiency and durability compared to those using ZnO.