Management of transition dipoles in organic hole-transporting materials under solar irradiation for perovskite solar cells oleh Song Ah Ok, Bonghyun Jo, Sivaraman Somasundaram, Hwi Je Woo, Dae Woon Lee, Zijia Li, Bong-Gi Kim, Jong H. Kim, Young Jae Song, Tae Kyu Ahn, Sanghyuk Park, Hui Joon Park