Photo-induced storage and mask-free arbitrary micro-patterning in solution-processable and simple-structured photochromic organic light-emitting diodes

Yan Qian, Xiuxia Xu, Wenwen Li, Jianyun Wang, Bingyan Wei, Qi Wei, Xiaohong Yan, Wei Hu, Yanqing Lu, Linghai Xie, Xinwen Zhang, Wei Huang