A paper on enhancement of perovskite solar cell performance via alkali metal hydroxide treatment has been published in Solar Energy.

Buried interface treatment using alkali metal hydroxides for efficient and durable perovskite solar cells

Yuki Fujita, Daichi Koseki, Dai Senba, Badamgarav Purev-Ochir, Tianhao Wu, Telugu Bhim Raju, Chathuranganie A.M. Senevirathne, Pangpang Wang, Sunao Yamada, Jun Tae Song, Shintaro Ida, Zhanglin Guo*, Toshinori Matsushima*