A paper on development of SnO2 electron transport layers with structure controlled by annealing temperature and their application to perovskite solar cells has been published in Journal of Materials Chemistry A.

Design and mechanism investigation of aggregation-controlled double-layer SnO2 for enhanced performance in perovskite solar cells

Dai Semba, Siman Fang, Yuki Fujita, Hanbo Jung, Tianhao Wu, Chathuranganie A. M. Senevirathne, Telugu Bhim Raju, Pangpang Wang, Sunao Yamada, Kaoru Tamada, Tatsumi Ishihara, Zhanglin Guo and Toshinori Matsushima*