고성능 텐덤 태양전지 제작을 위한 자기조립단분자박막의 분자구조 및 소자 효율 최적화

다국어 초록 (Multilingual Abstract)

Perovskite solar cells have attracted considerable attention as next-generation photovoltaics that could replace silicon solar cells, and in particular, in inverted (p–i–n) architectures, the design of the interface between the hole-transport layer and the perovskite absorber is a key determinant of device performance. In this work, to enable more precise interfacial control, we introduce self-assembled monolayers (SAMs) and propose new hole-affinitive organic molecules through rational molecular design and synthesis, aiming to apply them to wide-bandgap inverted perovskite solar cells. By comprehensively analyzing DFT calculations and a broad set of experimental data—including UV–Vis absorption, UPS, contact angle, XRD, SEM, XPS, steady-state PL, front/back TRPL, light-intensity-dependent Voc, SCLC, J–V characteristics, and EQE spectra—we demonstrate that the SAM-based devices simultaneously enhance interfacial dipole formation, defect passivation, and hole transport, leading to improved current density, open-circuit voltage, and fill factor, and ultimately achieving a higher power conversion efficiency than devices employing conventional hole-transport layers.

목차 (Table of Contents)

• 1. 서론 1
• 2. 실험 12
• 2.1. 일반 실험 방법 12
• 2.2. 합성방법 12
• 2.3. 셀 제조 방법 18
• 3. 실험 결과 및 고찰 21
• 3.1. 재료 특성 분석 21
• 3.2. 계면 특성 분석 30
• 3.3. 전하 수송 및 소자 성능 분석 37
• 4. 결론 47
• 참고문헌 50