Vacuum-deposited perovskite photovoltaics for highly efficient environmental light energy harvesting. Issue 8 (29th January 2019)

• Record Type: Journal Article
• Authors: Chen, Chien-Yu; Lee, Wei-Hung; Hsiao, Sheng-Yi; Tsai, Wei-Lun; Yang, Lin; Lin, Hong-Lin; Chou, He-Jun; Lin, Hao-Wu
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 8(2019)
• Page Start: 3612
• Page End: 3617
• Publication Date: 2019-01-29
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta11515j
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The performance of vacuum-deposited organometal halide perovskite devices under low-intensity illumination was investigated. Both small- and large-area devices exhibited high power conversion efficiencies up to 30.1% and 24.9%, respectively, with excellent long-term stabilities more than one year. Abstract : The performance of vacuum-deposited organometal halide perovskite devices under low-intensity illumination was investigated. The low defect density of the vacuum-deposited perovskite thin film facilitates the development of a high performance device with low-cost C60 as the electron transporting layer, which is superior to solution-processed cells made by a 2-step spin-casting method with expensive fullerene derivatives. The small-area vacuum-deposited devices exhibited high power conversion efficiencies and output power densities of up to 30.1% and 94.9 μW cm −2 at 1000 lux and 28.5% and 18.1 μW cm −2 at 200 lux, respectively. The large-area vacuum-deposited devices with an active area of 5.68 cm 2 showed high reproducibility and exhibited high power conversion efficiencies and output power densities up to 24.9% and 77.6 μW cm −2 at 1000 lux and 21.9% and 13.8 μW cm −2 at 200 lux, respectively. Moreover, the small- and large-area devices also showed good stability and a negligible efficiency decrease in one year. The high performance and high stability results indicate that vacuum-deposited perovskite photovoltaics are one of the most promising energy harvesters for low-power electronics in the future.