光子学报, 2020, 49 (9): 0931002, 网络出版: 2020-12-26  

复合绒面ZnO:Al光栅增强薄膜硅电池陷光特性 下载: 583次

Light Trapping Enhancement of Composite Rough Surface ZnO:Al Gratings in Thin Film Silicon Solar Cells
作者单位
1 吉林大学珠海学院, 广东 珠海 519041
2 黄山学院 信息工程学院, 安徽 黄山 245041
3 中国科学院上海技术物理研究所, 上海 200083
摘要
探讨复合绒面ZnO:Al光栅对薄膜硅太阳能电池光俘获效率的影响.织构了由关联长度(lcor)和平均高度(have)表征的绒面,叠加到周期为980 nm和槽深为160 nm的一维正弦ZnO:Al光栅上,形成复合绒面ZnO:Al光栅.前电极AZO光栅,当lcor较小和have较大时,电池的短路电流较高.若lcor取0.01,则短路电流随have的增大而升高,由have=0.05时的21.93 mA/cm2增加到have=0.80时的23.80 mA/cm2.置于背电极且lcor=0.01时,短路电流随have的增加而逐渐减小,由have=0.05时的25.50 mA/cm2降到have=0.80时的24.81 mA/cm2.采用直流溅射和化学腐蚀方法分别制备了无绒面ZnO:Al光栅和lcor=0.01,have=0.14的复合绒面ZnO:Al光栅.反射率测试结果表明,复合绒面ZnO:Al光栅总反射率(8.3%)较无绒面ZnO:Al栅(10.2%)降低了1.9%,镜面反射率(4.7%)较无绒面ZnO:Al栅(6.8%)降低了2.1%.以实验制备的两种光栅为模型用严格耦合波方法进行模拟,计算结果表明与无绒面ZnO:Al光栅相比,复合绒面ZnO:Al光栅的总反射率和镜面反射率均显著下降.复合绒面ZnO:Al光栅由于具有较好的减反作用更适合用作薄膜电池前电极,从而得到更高的短路电流;而无绒面ZnO:Al光栅因具有较高的反射适用于背电极,能将到达背电极的光子重新返回硅吸收层而获得更高的陷光效率.
Abstract
This paper discussed the influence of composite rough surface aluminum-doped zinc oxide (ZnO:Al) gratings on light trapping efficiency of thin film silicon solar cells. Rough surface was characterized by correlation length (lcor) and average height (have), and superimposed on a one-dimension sine ZnO:Al grating with 980 nm period and 160 nm groove depth. The short-circuit current was higher when front electrode AZO grating had smaller lcor and larger have. As lcor=0.01, short-circuit current raised with the increase of have value, from 21.93 mA/cm2 of have=0.05 to 23.80 mA/cm2 of have=0.80. When used as back electrode, the short-circuit current decreased with the increase of have, from 25.50 mA/cm2 of have=0.05 to 24.81 mA/cm2 of have=0.80. Composite rough surface ZnO:Al grating and non-rough surface ZnO:Al grating were fabricated by chemical etching and direct current sputter respectively. Reflectivity results showed that total reflection of composite rough surface ZnO:Al grating (8.3%) was 1.9% lower than that of non-rough surface ZnO:Al grating (10.2%), and specular reflection of composite rough surface ZnO:Al grating (4.7%) was 2.1% lower than that of non-rough surface ZnO:Al grating (6.8%). Rigorous coupled wave method was used to simulate reflection of ZnO:Al grating with and non- rough surface. Results further confirmed that composite rough ZnO:Al grating was more suitable for front electrode of thin film solar cells due to its better anti-reflection effect and could obtain a larger short-circuit current. Non-rough surface ZnO:Al grating could reflect more photons back to silicon absorption layer due to its higher reflection and was more suitable for back electrode.

刘仁臣, 陆静, 程和平, 梁钊铭, 刘洋. 复合绒面ZnO:Al光栅增强薄膜硅电池陷光特性[J]. 光子学报, 2020, 49(9): 0931002. Ren-chen LIU, Jing LU, He-ping CHENG, Zhao-ming LIANG, Yang LIU. Light Trapping Enhancement of Composite Rough Surface ZnO:Al Gratings in Thin Film Silicon Solar Cells[J]. ACTA PHOTONICA SINICA, 2020, 49(9): 0931002.

引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!