Progress in Materials, Solution Processes, and Long-Term Stability for Large-Area Organic Photovoltaics
- Progress in Materials, Solution Processes, and Long-Term Stability for Large-Area Organic Photovoltaics
- 김태희; 손해정; 박성민; 윤성원; 고창우; 우한영
- organic solar cell; conjugated polymer
- Issue Date
- Advanced materials
- VOL 32, NO 51-2002217-29
- Organic solar cells based on bulk heterojunctions (BHJs) are attractive energyconversion devices that can generate electricity from absorbed sunlight by dissociating excitons and collecting charge carriers. Recent breakthroughs attained by development of nonfullerene acceptors result in significant enhancement in power conversion efficiency (PCEs) exceeding 17%. However, most of researches have focused on pursuing high efficiency of smallarea (<1 cm2) unit cells fabricated usually with spin coating. For practical application of organic photovoltaics (OPVs) from labscale unit cells to industrial products, it is essential to develop efficient technologies that can extend active area of devices with minimized loss of performance and ensured operational stability. In this progress report, an overview of recent advancements in materials and processing technologies is provided for transitioning from smallarea laboratoryscale devices to largearea industrial scale modules. First, development of materials that satisfy requirements of high tolerability in active layer thickness and largearea adaptability is introduced. Second, morphology control using various coating techniques in a large active area is discussed. Third, the recent research progress is also underlined for understanding mechanisms of OPV degradation and studies for improving device longterm stability along with reliable evaluation procedures.
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