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Improving the NIR light‐harvesting of perovskite solar cell with upconversion fluorotellurite glass
Author(s) -
Tang Jianfeng,
Zhang Yu,
Zheng Guobin,
Gou Jie,
Wu Fei
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15373
Subject(s) - photon upconversion , materials science , optoelectronics , perovskite (structure) , wavelength , open circuit voltage , band gap , energy conversion efficiency , excitation , doping , optics , voltage , chemistry , physics , quantum mechanics , crystallography
Upconversion glasses are capable of converting the sub‐bandgap NIR light into photons of a particular wavelength which can be efficiently utilized by solar cells. Herein, the Yb 3+ /Er 3+ co‐doped fluorotellurite upconversion glasses were prepared. The most intense upconversion luminescence ( UCL ) under 980‐nm LD excitation was obtained in the glass with Yb 3+ ‐to‐Er 3+ molar ratio of 10:1. The dependences of UCL on the pump power and temperature were investigated. The UCL can be mainly attributed to the two‐photon involved energy transfer processes and is very stable to the change in temperature even when heated up to 200°C. The subsequent implementation of the glass as upconverter for a MAP bI 3‐ x Cl x ‐based perovskite solar cell ( PSC ) resulted in an open circuit voltage of 0.83 V and a short circuit current density of 0.32 mA /cm 2 . This application of upconversion glass for enhancing the NIR light harvesting offers a promising way to improve the photo‐electric conversion efficiencies of PSC s.