Title :
Biomimetic surface nanostructure on GaN/In0.25Ga0.75N solar cells for broad angular enhancement
Author :
Wang, Hsun-Wen ; Tsai, Min-An ; Tu, Chia-Cheng ; Lin, Shiuan-Huei ; Kuo, Hao-Chung ; Yu, Pei-Chen ; Sheu, Jinn-Kong
Author_Institution :
Dept. of Electrophys., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
The GaN/In0.25Ga0.75N double-heterojunction solar cells with rough and nipple arrays Indium Tin Oxide (ITO) surface texture was fabricated by the inductively coupled plasma reactive ion etching (ICP-RIE) system. The peak of the external quantum efficiency for the samples with rough and nipple arrays ITO surface were each reached 29.17% and 34.25% at 420nm, and the enhancement with nipple arrays achieved highly 40% compared with the flat surface one. The results of the angle dependent current density were shown the outstanding antireflection for wide incident angle from 0° to 60°.
Keywords :
III-V semiconductors; current density; gallium compounds; indium compounds; nanostructured materials; semiconductor heterojunctions; solar cells; sputter etching; surface texture; wide band gap semiconductors; GaN-In0.25Ga0.75N; ITO; ITO surface texture; biomimetic surface nanostructure; broad angular enhancement; current density; double-heterojunction solar cells; indium tin oxide; inductively coupled plasma reactive ion etching; nipple arrays; rough arrays; Gallium nitride; Indium tin oxide; Photovoltaic cells; Rough surfaces; Surface roughness; Surface structures; Surface waves;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2011 37th IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-9966-3
DOI :
10.1109/PVSC.2011.6186109
