Rare-earth-doped upconversion(UC)materials are ideal candidates for solar photovoltaic conversion and NIR response devices due to their unique spectral conversion properties.However,their low efficiency remains a trem...Rare-earth-doped upconversion(UC)materials are ideal candidates for solar photovoltaic conversion and NIR response devices due to their unique spectral conversion properties.However,their low efficiency remains a tremendous challenge for practical applications.Here,we constructed an efficient NIR light-responsive device by coating a Si-photoresistor with a transparent gel consisting of UC powders and an organic polymer matrix.We show that reasonable introduction of alkali metal ions(Na~+,K~+,and Cs~+)into the lattice of UC crystals results in the improvement of photoelectricity conversion efficiency,due to the high crystallinity and surface reconstruction caused by alkali metal ion doping.展开更多
基金supported by the National Natural Science Foundation of China(No.62105297)the Youth Backbone Teacher of Henan Province(No.2020GGJS197)+6 种基金the Natural Science Foundation of Henan Province(212300410375)the Key Scientific Research Projects of Henan Province(No.21A140018)the College Students Innovations Special Project(Nos.202110482016,202110482022,202110482028,and 202210482004)the Excellent Team of Spectrum Technology and Application of Henan Province(No.18024123007)the Open Research Fund Program of Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications,Zhongyuan Yingcai Jihua(No.ZYYCYU202012144)the Quzhou Science and Technology Plan Projects(No.18024123007)the Key Laboratory of Advanced Micro-Structure Materials,Ministry of Education,Shanghai,China。
文摘Rare-earth-doped upconversion(UC)materials are ideal candidates for solar photovoltaic conversion and NIR response devices due to their unique spectral conversion properties.However,their low efficiency remains a tremendous challenge for practical applications.Here,we constructed an efficient NIR light-responsive device by coating a Si-photoresistor with a transparent gel consisting of UC powders and an organic polymer matrix.We show that reasonable introduction of alkali metal ions(Na~+,K~+,and Cs~+)into the lattice of UC crystals results in the improvement of photoelectricity conversion efficiency,due to the high crystallinity and surface reconstruction caused by alkali metal ion doping.
