High-performance integrated perovskite and organic solar cells with efficient near-infrared harvesting

Title
High-performance integrated perovskite and organic solar cells with efficient near-infrared harvesting
Authors
김정환이광희
Issue Date
2016-10
Publisher
SPIE Organic Photonics+Electronics
Citation
VOL 9942, 994203
Abstract
The integration of planar-type perovskite (E-g similar to 1.5 eV) solar cells (PSCs) with a bulk-heterojunction (BHJ) composite comprising a near-infrared (NIR) absorbing conjugated polymer ( E-g < 1.4 eV) and a fullerene derivative is a promising approach to overcoming the narrow absorption limit of typical PSCs. Nevertheless, integrated solar cells (ISCs) suffer from low fill factors (FFs) and inefficient NIR harvesting, mainly due to poor charge transport in the BHJ films. Here, we successfully demonstrate highly efficient P-I-N perovskite/BHJ ISCs with an enhanced FF and improved NIR harvesting by introducing a novel n-type semiconducting polymer and a new processing additive into the BHJ films. The optimized ISCs exhibit a power conversion efficiency (PCE) of 16.36%, which far surpasses that of the reference PSCs (similar to 14.70%) due to the increased current density (J(sc) similar to 20.04 mA cm(-2)) resulting from the additional NIR harvesting. Meanwhile, the optimized ISCs maintain a high FF of 77% and an open-circuit voltage (V-oc) of 1.06 V. These results indicate that this approach is a versatile means of overcoming the absorption and theoretical efficiency limits of state-of-the-art PSCs.
URI
http://pubs.kist.re.kr/handle/201004/68217
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KIST Publication > Conference Paper
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