저온공정 ZnO 적용에 따른 역구조 고분자 태양전지 소자 성능 연구

• Published in: 한국태양에너지학회 논문집 Vol. 41; no. 3; pp. 39 - 50
• Main Authors: 전재민(Jeon Jae-Min), 신동열(Shin Dong-Yeol), 정우진(Jeong Woo-Jin), 곽희정(Kwak Hee-Jung), 김준영(Kim Jun-Young)
• Format: Journal Article
• Language: Korean
• Published: 한국태양에너지학회 01.06.2021
• Subjects: 기타공학; 전자추출층(Electron Extraction layer); 전력변환효율(Power Conversion Efficiency); 산화아연(Zinc Oxide); 저온공정(low-temperature process); 졸젤법(sol-gel process); 나노입자법(Nanoparticle Process)
• ISSN: 1598-6411; 2508-3562

Recently, active research is being conducted on polymer solar cells to improve powerconversion efficiency by developing new device structures, synthesizing polymer materials, andapplying them to charge extraction layers. In this study, we analyzed the influence of ZnO onthe performance of solar cells by using various ZnO thin films (using the high and lowtemperature sol-gel processes and the nanoparticle process) as an electron extraction layer ininverted polymer solar cells based on PBDB-T:ITIC. The ZnO thin film was formed by thehigh-temperature (450°C) sol-gel process, which resulted in an increase in the sheet resistanceof the ITO electrode by five times. As a result, the power conversion efficiency of the polymersolar cells was low (4.12%). Conversely, in the nanoparticle process, butanol-based ZnOexhibited better dispersion and surface properties than the IPA-based ZnO, resulting inimproved performance of the polymer solar cell (PCE of 6.35% and 4.58% with butanol andIPA-based ZnO, respectively). Additionally, a ZnO precursor solution was developed using thelow-temperature (150°C) sol-gel process, which was applied as an electron extraction layer inan inverted polymer solar cell. Consequently, the device performance significantly improved(PCE of 8.89%)due to the formation of a ripple-shaped surface, which facilitated the extractionof electrons due to the excellent surface roughness. KCI Citation Count: 0