Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 23, Pages 20670-20675Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am504163r
Keywords
organic solar cells; silk fibroin; flexibility; biocompatible; silver nanowires
Funding
- National Basic Research Program of China [2012CB932402]
- National Natural Science Foundation of China [91123005, 61176057, 91027039, 51373110, 61211130358]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [10KJA540046]
- Nanotechnology Foundation of Suzhou [ZXG2013037]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Qing Lan Project for Excellent Scientific and Technological Innovation Team of Jiangsu Province
- Project for Jiangsu Scientific and Technological Innovation Team
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices and Collaborative Innovation Center of Suzhou Nano Science and Technology
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Organic electronics have gained widespread attention due to their flexibility, lightness, and low-cost potential. It is attractive due to the possibility of large-scale roll-to-roll processing. However, organic electronics require additional development before they can be made commercially available and fully integrated into everyday life. To achieve feasibility for commercial use, these devices must be biocompatible and flexible while maintaining high performance. In this study, biocompatible silk fibroin (SF) was integrated with a mesh of silver nanowires (AgNWs) to build up flexible organic solar cells with maximum power conversion efficiency of up to 6.62%. The AgNW/SF substrate exhibits a conductivity of similar to 11.0 Omega/sq and transmittance of similar to 80% in the visible light range. These substrates retained their conductivity, even after being bent and unbent 200 times; this surprising ability was attributed to its embedded structure and the properties of the specific SF materials used. To contrast, indium tin oxide on synthetic plastic substrate lost its conductivity after the much less rigid bending. These lightweight and silk-based organic solar cells pave the way for future biocompatible interfaces between wearable electronics and human skin.
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