Dual-phase zinc selenide in situ encapsulated into size-reduced ZIF-8 derived selenium and nitrogen co-doped porous carbon for efficient triiodide reduction reaction. Issue 40 (5th October 2021)

• Record Type: Journal Article
• Authors: Yuan, Shuangxi; Yun, Sining; Zhang, Yongwei; Dang, Jiaoe; Sun, Menglong; Dang, Changwei; Deng, Yingying
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 40(2021)
• Page Start: 14408
• Page End: 14420
• Publication Date: 2021-10-05
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc02734d
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A ZIF-derived Se/N-doped carbon-supported dual-phase ZnSe hybrid as a robust CE catalyst for DSSCs provides a high PCE of 8.48%. Abstract : Constructing cost-effective and robust counter electrodes (CEs) without noble metals remains a challenge for the commercialization of current dye-sensitized solar cells (DSSCs). In this study, we focus on the built-in zinc element into the zeolitic imidazolate framework (ZIF-8) to construct a composite of dual-phase zinc selenide (ZnSe) encapsulated by the size-reduced ZIF-derived Se/N-doped carbon (PS N-CSR ) using a post-selenization procedure. Benefitting from the enhanced synergy and charge transfer between the small-sized doped carbon skeleton and well-dispersed dual-phase ZnSe active sites, the resultant PS N-CSR exhibited superior catalytic activity and durability to the triiodide reduction reaction (IRR). The devices that utilize PS N-CSR CE achieved a high power conversion efficiency of 8.48%, surpassing that of Pt (7.20%). It is expected that this work will provide an extensible pathway for designing efficient hybrid electrocatalysts with beneficial structures containing transition metal compounds based on ZIF analogs.