Jian S.-L.Huang Y.-J.Yeh M.-H.Ho K.-C.2019-05-172019-05-17201820507488https://scholars.lib.ntu.edu.tw/handle/123456789/408643Owing to its excellent electrocatalytic performance, zinc selenide (ZnSe) is regarded as a promising counter electrode (CE) material for dye-sensitized solar cells (DSSCs). In this study, a zeolitic imidazolate framework (ZIF-7) derived ZnSe nanocomposite is introduced as the electrocatalyst for the CE in a DSSC. First, ZIF-7 powder was subjected to carbonization and then transformed into ZIF-7/N-doped carbon (ZIF-NC). To further increase the electrocatalytic ability of the materials, ZIF-7-NC was selenized and transformed into a ZIF-7 derived ZnSe/N-doped carbon cube (ZIF-ZnSe-NC). After optimizing the weight percentage of the ZIF-ZnSe-NC film, the DSSCs with a CE of ZIF-ZnSe-NC-11 wt% rendered a photovoltaic conversion efficiency (£b) of 8.69 ¡Ó 0.13%, which is higher than that of the cell with a Pt CE (8.26 ¡Ó 0.02%). This study concludes that the CE based on the ZIF-ZnSe-NC is a prospective substitute for Pt and could provide new opportunities for advancing high-efficiency DSSCs under in-house conditions with dim light illumination. ? 2018 The Royal Society of Chemistry.[SDGs]SDG7Carbonization; Efficiency; Electrocatalysts; Electrodes; II-VI semiconductors; Nanostructured materials; Platinum; Selenium compounds; Solar cells; Zinc Selenide; Counter electrodes; Dim light; Electrocatalytic ability; Electrocatalytic performance; High-efficiency; Photovoltaic conversion; Weight percentages; Zeolitic imidazolate frameworks; Dye-sensitized solar cellsjournal article10.1039/c8ta00968f2-s2.0-85044205697https://www.scopus.com/inward/record.uri?eid=2-s2.0-85044205697&doi=10.1039%2fc8ta00968f&partnerID=40&md5=9be8184c2393abdc3a741787076c78c3