Jonghee Yang, Seungjin Lee, Seong Chan Cho, Jung Won Yoon, Hochan Song, Jae Taek Oh, Seul Gi Lim, Sung Yong Bae, Edward H. Sargent, Whikun Yi*, Sang Uck Lee* and Hyosung Choi* Guanidinium-Pseudohalide Perovskite Interfaces Enable Surface Reconstruction of Colloidal Quantum Dots for Efficient and Stable Photovoltaics ACS Nano 2022, 16, 1649. DOI: 10.1021/acsnano.1c10636