Nature Energy, Published online: 20 October 2026; doi:10.1038/s41560-026-02148-w

Cathode interlayers play a pivotal role in improving the performance of organic solar cells. Yao, Zhang, Zhang, Wang et al. show a stepwise solvent treatment to achieve a vertically aligned cathode interlayer, enabling a certified efficiency of 20.65% in binary organic solar cells.

Nature Energy, Published online: 18 August 2026; doi:10.1038/s41560-026-02101-x

A major challenge for indoor photovoltaics is the absence of harmonized testing protocols, standards, and shared performance benchmarks. This Consensus Statement outlines recommended practices for testing and reporting device performance, power, efficiency and stability.