Efficiency enhancement in solution-processed organic small molecule: Fullerene solar cells via solvent vapor annealing
In this paper, we report highly efficient small molecule solar cells (SMSCs) by using dichloromethane solvent vapor annealing method. The resulted devices delivered a power conversion efficiency (PCE) of 8.3%, which is among the highest in SMSCs. Comparing to the control devices, the short circuit current (Jsc), fill factor, and PCE of solvent vapor annealed devices are significantly improved. Summarizing the results of optical absorption, film morphology, and charge carrier transporting properties, we see that the enhanced structure order and reduced size of phase separation are major reasons for the improved device performances, establishing a solid structure-property relationship. The solvent vapor annealing method can thus be a useful method in device fabrication to enhance performances of SMSCs.
- Research Organization:
- Energy Frontier Research Centers (EFRC), Washington D.C. (United States). Polymer-Based Materials for Harvesting Solar Energy (PHaSE)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0001087
- OSTI ID:
- 1226740
- Alternate ID(s):
- OSTI ID: 1370260; OSTI ID: 1420504
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Vol. 106 Journal Issue: 18; ISSN 0003-6951
- Publisher:
- American Institute of PhysicsCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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