Ultrawide Spectral Response of CIGS Solar Cells Integrated with Luminescent Down-Shifting Quantum Dots
Ultrawide Spectral Response of CIGS Solar Cells Integrated with Luminescent Down-Shifting Quantum Dots
复制标题
DOI：
10.1021/acsami.7b08122
复制
发表时间：
2017-08-02
影响因子：
9.5
通讯作者：
Jang, Jae-Hyung
中科院分区：
文献类型：
--
作者：
Jeong, Ho-Jung;Kim, Ye-Chan;Jang, Jae-Hyung
传统的Cu(In1-x,Ga-x)Se-2 （CIGS）太阳能电池在300 ~ 520 nm的短波长范围内由于窗口层和缓冲层的寄生光吸收而表现出较差的光谱响应。在本研究中，CdSe/CdZnS核壳量子点（QDs）作为发光降移（LDS）层插入到MgF2减反射涂层和GIGS太阳能电池的窗口层之间，以提高短波长范围内的光收集。LDS层吸收波长较短的光子，并重新发射609 nm的光子，这些光子通过窗口和缓冲层传输，并被CIGS层吸收。寄生光吸收区（300 ~ 520 nm）的平均外量子效率提高了51%。结果表明，采用CdSe/CdZnS量子点的CIGS太阳能电池的短路电流密度为34.04 mA/cm(2)，功率转换效率为14.29%，分别比不采用量子点的CIGS太阳能电池提高了4.35%和3.85%。
Conventional Cu(In1-x,Ga-x)Se-2 (CIGS) solar cells exhibit poor spectral response due to parasitic light absorption in the window and buffer layers at the short wavelength range between 300 and 520 nm. In this study, the CdSe/CdZnS core/shell quantum dots (QDs) acting as a luminescent down-shifting (LDS) layer were inserted between the MgF2 antireflection coating and the window layer of the GIGS solar cell to improve light harvesting in the short wavelength range. The LDS layer absorbs photons in the short wavelength range and re-emits photons in the 609 nm range, which are transmitted through the window and buffer layer and absorbed in the CIGS layer. The average external quantum efficiency in the parasitic light absorption region (300-520 nm) was enhanced by 51%. The resulting short circuit current density of 34.04 mA/cm(2) and power conversion efficiency of 14.29% of the CIGS solar cell with the CdSe/CdZnS QDs were improved by 4.35 and 3.85%, respectively, compared with those of the conventional solar cells without QDs.