Enhanced UV-light stability of planar heterojunction perovskite solar cells with caesium bromide interface modification. Issue 2 (15th January 2016)

• Record Type: Journal Article
• Authors: Li, Wenzhe; Zhang, Wei; Van Reenen, Stephan; Sutton, Rebecca J.; Fan, Jiandong; Haghighirad, Amir A.; Johnston, Michael B.; Wang, Liduo; Snaith, Henry J.
• Is Part Of: Energy & environmental science. Volume 9:Issue 2(2016)
• Page Start: 490
• Page End: 498
• Publication Date: 2016-01-15
• Subjects: Energy conversion -- Periodicals; Fuel switching -- Periodicals; Environmental sciences -- Periodicals; Environmental chemistry -- Periodicals; 333.79
• DOI: 10.1039/c5ee03522h
• Languages: English
• ISSNs: 1754-5692

Abstract

Abstract : CsBr interface modification simultaneously enhances the device power conversion efficiency and improves the device resilience to UV irradiation. Abstract : Interfacial engineering has been shown to play a vital role in boosting the performance of perovskite solar cells in the past few years. Here we demonstrate that caesium bromide (CsBr), as an interfacial modifier between the electron collection layer and the CH3 NH3 PbI3− x Cl x absorber layer, can effectively enhance the stability of planar heterojunction devices under ultra violet (UV) light soaking. Additionally, the device performance is improved due to the alleviated defects at the perovskite-titania heterojunction and enhanced electron extraction.