The Role of Lanthanum in a Nickel Oxide‐Based Inverted Perovskite Solar Cell for Efficiency and Stability Improvement. Issue 2 (27th December 2018)

• Record Type: Journal Article
• Authors: Teo, Siowhwa; Guo, Zhanglin; Xu, Zhenhua; Zhang, Chu; Kamata, Yusuke; Hayase, Shuzi; Ma, Tingli
• Is Part Of: ChemSusChem. Volume 12:Issue 2(2019)
• Page Start: 518
• Page End: 526
• Publication Date: 2018-12-27
• Subjects: efficient -- hole-transporting layer -- inverted perovskite solar cell -- lanthanum-NiOx -- stability; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201802231
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: A high‐performing inverted perovskite solar cell (PSC) always relies on the hole transporting layer (HTL) quality and its interfaces. This work investigates the impact of La incorporation within the NiO x matrix for defects passivation, thus leading to high charge extraction ability and stability without compromising its power conversion efficiency. In the presence of La, the La–NiO x quality is clearly improved; without the formation of pinholes. In addition, the inclusion of La alters the energy band alignment; consequently, enhancing the hole transportation and widening the V oc (>1 V), as compared to the pristine NiO x . The beneficial effect of La was further revealed through the photoluminescence measurement and density of states (DOS) analysis, in which trap states are passivated by La. More importantly, the perovskite solar cell, with La–NiO x as the HTL, exhibits 21 % enhancement in efficiency and a remarkable stability that is greater than that of pristine NiO x . This also unlocks an opportunity for commercialization. Abstract : Inversion therapy : A high‐performing inverted perovskite solar cell (PSC) always relies on the hole transporting layer (HTL) quality and its interfaces. This study concerns the impact of lanthanum incorporation within the NiO x matrix for high conductivity, charge extraction ability, and stability without compromising its power conversion efficiency.