Selenium(Se)element is a promising light-harvesting material for solar cells because of the large absorption coefcient and prominent photoconductivity.However,the efciency of Se solar cells has been stagnated for a lo...Selenium(Se)element is a promising light-harvesting material for solar cells because of the large absorption coefcient and prominent photoconductivity.However,the efciency of Se solar cells has been stagnated for a long time owing to the suboptimal bandgap(>1.8 eV)and the lack of a proper electron transport layer.In this work,we tune the bandgap of the absorber to the optimal value of Shockley-Queisser limit(1.36 eV)by alloying 30%Te with 70%Se.Simultaneously,ZnO electron transport layer is selected because of the proper band alignment,and the mild reaction at ZnO/Se_(0.7)Te_(0.3) interface guarantees a good-quality heterojunction.Finally,a superior efciency of 1.85%is achieved on ZnO/Se_(0.7)Te_(0.3)solar cells.展开更多
Accurate and clear bioimaging is crucial in the field of medical diagnosis.High-quality bioimaging requires to avoid the effects of ambient light as well as the absorption of biological tissues.Nearinfrared(NIR)narrow...Accurate and clear bioimaging is crucial in the field of medical diagnosis.High-quality bioimaging requires to avoid the effects of ambient light as well as the absorption of biological tissues.Nearinfrared(NIR)narrowband detectors located at wavelength from 650 to 900 nm can meet these requirements;thus,they are the potential solution.In this work,we construct a filter-free and self-power NIR narrowband photodetector based on the structure of n-CdSe/p-Sb_(2)(S_(1-x),Se_(x))_(3)heterojunction,and achieve a narrow spectral response at 735 nm with a full width at half-maximum of 35.3 nm in the detector.Further,the imaging characteristics of the NIR narrowband detector are explored,verifying the ability to narrowband detection and imaging.This filter-free and self-power NIR narrowband detector shows considerable promise in real-life applications.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.61725401,62174064,62105110,and 61904058)Natural Science Foundation of Hubei Province(No.2021CFB373)+2 种基金Fundamental Research Funds for the Central Universities(No.2021XXJS028)National Key R&D Program of China(No.2021YFA0715502)support of the project funded by China Postdoctoral Science Foundation(Nos.2020M680101 and 2021T140233).
文摘Selenium(Se)element is a promising light-harvesting material for solar cells because of the large absorption coefcient and prominent photoconductivity.However,the efciency of Se solar cells has been stagnated for a long time owing to the suboptimal bandgap(>1.8 eV)and the lack of a proper electron transport layer.In this work,we tune the bandgap of the absorber to the optimal value of Shockley-Queisser limit(1.36 eV)by alloying 30%Te with 70%Se.Simultaneously,ZnO electron transport layer is selected because of the proper band alignment,and the mild reaction at ZnO/Se_(0.7)Te_(0.3) interface guarantees a good-quality heterojunction.Finally,a superior efciency of 1.85%is achieved on ZnO/Se_(0.7)Te_(0.3)solar cells.
基金China Postdoctoral Science Foundation Project,Grant/Award Numbers:2020M680101,2021T140233Fundamental Research Funds for the Central Universities,Grant/Award Number:2021XXJS028+2 种基金National Natural Science Foundation of China,Grant/Award Numbers:61725401,61904058,62050039the Graduates'Innovation Fund of Huazhong University of Science and Technology,Grant/Award Number:2021yjsCXCY051the National Key R&D Program of China,Grant/Award Number:2016YFA0204000。
文摘Accurate and clear bioimaging is crucial in the field of medical diagnosis.High-quality bioimaging requires to avoid the effects of ambient light as well as the absorption of biological tissues.Nearinfrared(NIR)narrowband detectors located at wavelength from 650 to 900 nm can meet these requirements;thus,they are the potential solution.In this work,we construct a filter-free and self-power NIR narrowband photodetector based on the structure of n-CdSe/p-Sb_(2)(S_(1-x),Se_(x))_(3)heterojunction,and achieve a narrow spectral response at 735 nm with a full width at half-maximum of 35.3 nm in the detector.Further,the imaging characteristics of the NIR narrowband detector are explored,verifying the ability to narrowband detection and imaging.This filter-free and self-power NIR narrowband detector shows considerable promise in real-life applications.
