Authors: Yuljae Cho; Bo Hou; Jongchul Lim; Sanghyo Lee; Sangyeon Pak; John Hong; Paul Giraud; A-Rang Jang; Young-Woo Lee; Juwon Lee; Jae Eun Jang; Henry J Snaith; Stephen M Morris; Jung Inn Sohn; SeungNam Cha; Jong Min Kim Journal: ACS Energy Lett Date: 2018-04-03 Impact factor: 23.101