The passivation layers at the front of the cell are often referred as to the window layer because it must be transparent so as the solar cell has a high efficiency. In this work, numerical simulation has been proposed...The passivation layers at the front of the cell are often referred as to the window layer because it must be transparent so as the solar cell has a high efficiency. In this work, numerical simulation has been proposed to study the effect of the AlGaAs gradual and normal windows on the cell sensitivity to the electron irradiation so as to passivate the solar cell. To expect the effect of gradual window layers, the J-V and P-V characteristics are confirmed better energy conversion performance of the illuminated solar cells after irradiation. The short circuit current Jsc and the open circuit voltage Voc are evaluated for different electron irradiation fluencies. The results show how the gradual window layer improves resistance to electron irradiation through its own parameters.展开更多
Comparing with hot researches in absorber layer,window layer has attracted less attention in PbS quantum dot solar cells(QD SCs). Actually, the window layer plays a key role in exciton separation, charge drifting, and...Comparing with hot researches in absorber layer,window layer has attracted less attention in PbS quantum dot solar cells(QD SCs). Actually, the window layer plays a key role in exciton separation, charge drifting, and so on.Herein, ZnO window layer was systematically investigated for its roles in QD SCs performance. The physical mechanism of improved performance was also explored. It was found that the optimized ZnO films with appropriate thickness and doping concentration can balance the optical and electrical properties, and its energy band align well with the absorber layer for efficient charge extraction. Further characterizations demonstrated that the window layer optimization can help to reduce the surface defects, improve the heterojunction quality, as well as extend the depletion width. Compared with the control devices, the optimized devices have obtained an efficiency of 6.7% with an enhanced V_(oc) of 18%, J_(sc) of 21%, FF of 10%, and power conversion efficiency of 58%. The present work suggests a useful strategy to improve the device performance by optimizing the window layer besides the absorber layer.展开更多
It is introduced the current situation and development for solar heating technology including passive solar heating and solar heating combisystems in China in this paper. Combined with the engineering application proj...It is introduced the current situation and development for solar heating technology including passive solar heating and solar heating combisystems in China in this paper. Combined with the engineering application projects, the author gave the technical and economic analysis of the passive solar and solar heating combisystems in China and summarized the developing obstacle and the spreading tactics for raising marketing of the solar heating in China.展开更多
利用AMPS程序模拟研究了非晶硅锗薄膜太阳电池的窗口层材料和厚度以及背接触势垒对电池光伏性能的影响。模拟发现带隙为1.92 e V的非晶硅碳更适合作为太阳电池的窗口层,且窗口层越薄电池的性能越好。模拟还发现,背接触势垒越低,则电池...利用AMPS程序模拟研究了非晶硅锗薄膜太阳电池的窗口层材料和厚度以及背接触势垒对电池光伏性能的影响。模拟发现带隙为1.92 e V的非晶硅碳更适合作为太阳电池的窗口层,且窗口层越薄电池的性能越好。模拟还发现,背接触势垒越低,则电池的光伏性能越好,当背接触势垒在0.11-0.51 e V的范围内时电池的转换效率不会受到背接触势垒的影响。展开更多
文摘The passivation layers at the front of the cell are often referred as to the window layer because it must be transparent so as the solar cell has a high efficiency. In this work, numerical simulation has been proposed to study the effect of the AlGaAs gradual and normal windows on the cell sensitivity to the electron irradiation so as to passivate the solar cell. To expect the effect of gradual window layers, the J-V and P-V characteristics are confirmed better energy conversion performance of the illuminated solar cells after irradiation. The short circuit current Jsc and the open circuit voltage Voc are evaluated for different electron irradiation fluencies. The results show how the gradual window layer improves resistance to electron irradiation through its own parameters.
基金financially supported by the National Natural Science Foundation of China(61306137,51602114)the Research Fund for the Doctoral Program of Higher Education(20130142120075)+2 种基金the Fundamental Research Funds for the Central Universities(HUST:2016YXMS032)the Guangdong-Hong Kong joint innovation project(Grant No.2016A050503012)the Guangdong Natural Science Funds for Distinguished Young Scholars(Grant No.2015A030306044)
文摘Comparing with hot researches in absorber layer,window layer has attracted less attention in PbS quantum dot solar cells(QD SCs). Actually, the window layer plays a key role in exciton separation, charge drifting, and so on.Herein, ZnO window layer was systematically investigated for its roles in QD SCs performance. The physical mechanism of improved performance was also explored. It was found that the optimized ZnO films with appropriate thickness and doping concentration can balance the optical and electrical properties, and its energy band align well with the absorber layer for efficient charge extraction. Further characterizations demonstrated that the window layer optimization can help to reduce the surface defects, improve the heterojunction quality, as well as extend the depletion width. Compared with the control devices, the optimized devices have obtained an efficiency of 6.7% with an enhanced V_(oc) of 18%, J_(sc) of 21%, FF of 10%, and power conversion efficiency of 58%. The present work suggests a useful strategy to improve the device performance by optimizing the window layer besides the absorber layer.
文摘It is introduced the current situation and development for solar heating technology including passive solar heating and solar heating combisystems in China in this paper. Combined with the engineering application projects, the author gave the technical and economic analysis of the passive solar and solar heating combisystems in China and summarized the developing obstacle and the spreading tactics for raising marketing of the solar heating in China.
文摘利用AMPS程序模拟研究了非晶硅锗薄膜太阳电池的窗口层材料和厚度以及背接触势垒对电池光伏性能的影响。模拟发现带隙为1.92 e V的非晶硅碳更适合作为太阳电池的窗口层,且窗口层越薄电池的性能越好。模拟还发现,背接触势垒越低,则电池的光伏性能越好,当背接触势垒在0.11-0.51 e V的范围内时电池的转换效率不会受到背接触势垒的影响。
