대면적 실리콘 태양전지의 PDMS 도포에 의한 반사방지막 특성

• Published in: Current Photovoltaic Research Vol. 10; no. 4; pp. 95 - 100
• Main Authors: 심명섭(MyeongSeob Sim), 정유진(Yujin Jung), 최동진(Dongjin Choi), 박현정(HyunJung Park), 강윤묵(Yoonmook Kang), 김동환(Donghwan Kim), 이해석(Hae-Seok Lee)
• Format: Journal Article
• Language: Korean
• Published: 한국태양광발전학회 2022
• Subjects: Anti-reflection coating; Encapsulation; Solar cell; Silicon; PDMS; Large area
• ISSN: 2288-3274; 2508-125X

Solar cell is a device that converts photon energy into electrical energy. Therefore, absorption of solar spectrum light is one of the most important characteristics to design the solar cell structures. Various methods have emerged to reduce optical losses, such as textured surfaces, back contact solar cells, anti-reflection layers. Here, the anti-reflection coating (ARC) layer is typically utilized whose refractive index value is between air (~1) and silicon (~4) such as SiNx layer (~1.9). This research is to print a material called polydimethylsiloxane (PDMS) to form a double anti-reflection layer. Light with wavelength in the range of 0.3 to 1.2 micrometers does not share a wavelength with solar cells. It is confirmed that the refractive index of PDMS (~1.4) is an ARC layer which decreases the reflectance of light absorption region on typical p-type solar cells with SiNx layer surface. Optimized PDMS printing with analyzing optical property for cell structure can be the effective way against outer effects by encapsulation.