Li Tzu-Chien, Chang Chia-Wen, Tai Chia-Chun, Ho Jyh-Jier, Hsieh Tung-Po, Liu Yung-Tsung, Lu Tsung-Lin
Department of Electrical Engineering, National Taiwan Ocean University, No. 2, Peining Rd., Keelung 20224, Taiwan.
Photovoltaic Technology Division, Green Energy and Environment Research Laboratories, Industrial Tech Research Institute, No. 195, Sec. 4, Chung-Hsing Rd., Chutung, Hsinchu 310401, Taiwan.
Micromachines (Basel). 2023 Aug 31;14(9):1709. doi: 10.3390/mi14091709.
In this paper, the performance of Cu-(In,Ga)-S (CIGS) solar cells with adjusting composite [Cu]/([Ga] + [In]) (CGI)-ratio absorber was explored and compared through an improved three-stage co-evaporation technique. For co-evaporating CIGS absorber as a less toxic alternative to Cd-containing film, we analyzed the effect of the CGI-ratio stoichiometry and crystallinity, and explored its opto-electric sensing characteristic of individual solar cell. The results of this research signified the potential of high-performance CIGS-absorption solar cells for photovoltaic (PV)-module industrial applications. For the optimal CIGS-absorption film (CGI = 0.95), the Raman main-phase signal (A1) falls at 291 cm, which was excited by the 532 nm line of Ar-laser. Using photo-luminescence (PL) spectroscopy, the corresponding main-peak bandgaps measured was 1.59 eV at the same CGI-ratio film. Meanwhile, the best conversion efficiency ( = 3.212%) and the average external quantum efficiency (EQE = 51.1% in the visible-wavelength region) of photo-electric properties were achieved for the developed CIGS-solar cells (CGI = 0.95). The discoveries of this CIGS-absorption PV research provided a new scientific understanding of solar cells. Moreover, this research undeniably contributes to a major advancement towards practical PV-module applications and can help more to build an eco-friendly community.
本文通过改进的三阶段共蒸发技术,对具有可调复合[Cu]/([Ga]+[In])(CGI)比吸收层的铜铟镓硫(CIGS)太阳能电池的性能进行了探索和比较。为了共蒸发CIGS吸收层作为含镉薄膜毒性较小的替代物,我们分析了CGI比化学计量和结晶度的影响,并探索了单个太阳能电池的光电传感特性。本研究结果表明了高性能CIGS吸收型太阳能电池在光伏(PV)组件工业应用中的潜力。对于最佳的CIGS吸收膜(CGI = 0.95),拉曼主相信号(A1)位于291 cm处,由氩离子激光的532 nm谱线激发。使用光致发光(PL)光谱,在相同CGI比的薄膜上测得相应的主峰带隙为1.59 eV。同时,所开发的CIGS太阳能电池(CGI = 0.95)实现了最佳的光电性能转换效率( = 3.212%)和平均外量子效率(在可见光波长区域EQE = 51.1%)。这项CIGS吸收型光伏研究的发现为太阳能电池提供了新的科学认识。此外,这项研究无疑为实际的光伏组件应用取得了重大进展,并有助于更多地建设生态友好型社区。