High Fill Factor Solution Processed Copper Phthacyloanine Nanoparticle Organic Solar Cells
Copper phthalocyanine (CuPc) organic solar cells (OSCs) have attracted more attentions because of the long-term stability, however, the high-cost fabrication method limits the application of CuPc OSCs. Here we report a surfactant-free CuPc nanoparticle organic solar cell with a much improved fill factor of 0.58, a power conversion efficiency (PCE) of 0.97% by low-cost spin coating process. Annealing plays a key role on the enhancement of the power conversion efficiency and the fill factor. The improvement of fill factor is attributed to the formation of nanoscale connection among CuPc nanoparticles by annealing, which is suggested by the decrease of series resistance and increase of parallel resistance. The formation of nanoscale connection is also confirmed by the size growth of the CuPc nanoparticles. We also discover that the electrical contact between the CuPc nanoparticle layer and hole transportation layer, and the electrical contact among CuPc nanoparticles are both improved by annealing.
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Document Type: Short Communication
Publication date: April 1, 2015
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- Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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