Theoretical investigation of some parameters into the behavior of quantum dot solar cells

作     者：A.Nasr A.Aly 

作者机构：Radiation Engineering DepartmentNCRRT Atomic Energy Authority Egypt College of Computer Qassim UniversityP.O.B.6688 Buryadah 51453 KSA Power Electronics and Energy Conversion DepartmentERI NRCB Egypt 

出 版 物：《Journal of Semiconductors》 (半导体学报（英文版）)

年 卷 期：2014年第35卷第12期

页      面：13-20页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：surface generation recombination rate quantum dot solar cells optical generation and recombination lifetimes dot density power conversion efficiency 

摘      要：The main goal of this paper is to determine the accurate values of two parameters namely the surface generation–recombination rate and the average total number of electrons density generated in the i-region. These values will enhance the performance of quantum dot solar cells（QDSCs）. In order to determine these values, this paper concentrates on the optical generation lifetime, the recombination lifetime, and the effective density state in QDs. Furthermore, these parameters are studied in relation with the average total number of electrons density. The values of the surface generation–recombination rate are found to be negative, which implies that the generation process is dominant in the absorption quantum dot region. Consequently, induced photocurrent density relation with device parameters is determined. The results ensure that QDSCs can have higher response photocurrent and then improve the power conversion efficiency. Moreover, the peak value of the average total number of electrons density is achieved at the UV range and is extended to the visible range, which is adequate for space and ground solar applications.