Enhanced Air Stability of Polymer Solar Cells with a Nanofibril-Based Photoactive Layer
SCIE
SCOPUS
- Title
- Enhanced Air Stability of Polymer Solar Cells with a Nanofibril-Based Photoactive Layer
- Authors
- Oh, JY; Shin, M; Lee, HW; Lee, YJ; Baik, HK; Jeong, U
- Date Issued
- 2014-05-28
- Publisher
- AMER CHEMICAL SOC
- Abstract
- In spite of the rapid increase in the power conversion efficiency (PCE) of polymer solar cells (PSCs), the poor stability of the photoactive layer in air under sunlight is a critical problem blocking commercialization of PSCs. This study investigates the photo-oxidation behavior of a bulk-heterojunction (BHJ) photoactive film made of single-crystalline poly(3-hexlythiophene) (P3HT) nanofibrils and fullerene derivatives [phenyl-C-61-butyric methyl ester (PCBM), indene-C 60 bisadduct (ICBA)]. Because the single-crystalline P3HT nanofibrils had tightly packed pi-pi stacking, the permeation of oxygen and water into the nanofibrils was significantly reduced. Chemical changes in P3HT were not apparent in the nanofibrils, and hence the air stability of the nanofibril-based BHJ film was considerably enhanced as compared with conventional BHJ films. The chemical changes were monitored by Fourier-transform infrared (FT-IR) spectroscopy, Raman spectroscopy, and UV-vis absorbance. Inverted PSCs made of the nanofibril-based BHJ layer also showed significantly enhanced air stability under sunlight. The nanofibril-based solar cell maintained more than 80% of its initial PCE after 30 days of continuous exposure to sunlight (AM 1.5G, 100 mW/cm(2)), whereas the PCE of the conventional BHJ solar cell decreased to 20% of its initial PCE under the same experimental conditions.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/35208
- DOI
- 10.1021/AM501034G
- ISSN
- 1944-8244
- Article Type
- Article
- Citation
- ACS APPLIED MATERIALS & INTERFACES, vol. 6, no. 10, page. 7759 - 7765, 2014-05-28
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.