Hysteresis-Less CsPbI2Br Mesoscopic Perovskite Solar Cells with a High Open-Circuit Voltage Exceeding 1.3 V and 14.86% of Power Conversion Efficiency
- Authors
- Kim, Do Hun; Heo, Jin Hyuck; Im, Sang Hyuk
- Issue Date
- 29-5월-2019
- Publisher
- AMER CHEMICAL SOC
- Keywords
- cesium lead halide; perovskite; solar cells; high open-circuit voltage; thermal stability
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.11, no.21, pp.19123 - 19131
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 11
- Number
- 21
- Start Page
- 19123
- End Page
- 19131
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/65365
- DOI
- 10.1021/acsami.9b03413
- ISSN
- 1944-8244
- Abstract
- High-performance and hysteresis-less mesoscopic CsPbI2Br perovskite solar cells (PSCs) are demonstrated by adapting hole-transporting materials (HTMs) with controlled highest occupied molecular orbital (HOMO) values. The used model HTMs are poly-3-hexylthiophene (P3HT), poly-triarylamine (P-TAA), poly-fluoren-8-triarylamine (PF8-TAA), and poly-indenofluoren-8-triarylamine (PIF8-TAA), and their HOMO energy levels position to -4.98, -5.09, -5.45, and 5.52 eV, respectively. By controlling the HOMO of the HTMs, the average open-circuit voltages of 25 mesoscopic CsPbI2Br PSCs are controllable from 1.11 +/- 0.030 V for a P3HT HTM-based device to 1.17 +/- 0.023, 1.21 +/- 0.027, and 1.27 +/- 0.028 V for P-TAA, PF8-TAA, and PIF8-TAA HTM-based devices. As a result, the PIF8-TAA HTM-based mesoscopic PSC exhibits the highest open-circuit voltage of 1.31 V and power conversion efficiency (PCE) of 14.20% for the forward scan condition and 14.86% for the reverse scan condition under 1 sun illumination (100 mW/cm(2) AM 1.5G). In addition, the unencapsulated mesoscopic CsPbI2Br PSCs exhibited 10-14% of PCE degradation compared to their initial efficiency in maximum power point tracking under continuous 1 sun light soaking at 85 degrees C for 1000 h.
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Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
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