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Integrated Perovskite/Organic Photovoltaics with Ultrahigh Photocurrent and Photoresponse Approaching 1000a??nm
摘要： To enhance photoresponse of common-used perovskite materials in the near-infrared (NIR) region, a fused-ring electron acceptor (F8IC) with strong NIR absorption and high electron mobility was used to blend with a narrow-bandgap polymer donor (PTB7-Th) to construct organic bulk heterojunction (OBHJ), and this OBHJ was then integrated with the perovskite solar cells. The integrated perovskite/OBHJ solar cells exhibit strong photoresponse approaching 1000 nm and an ultrahigh short-circuit current density of 28.2 mA cm-2, which is much higher than the traditional perovskite solar cells and organic solar cells.
关键词： integrated solar cell,perovskite solar cell,ultrahigh photocurrent,NIR photoresponse,organic solar cell
更新于2025-09-23 15:19:57
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Expanding the Light-Harvesting of CsPbI2Br to Near-Infrared by Integrating with Organic Bulk-Heterojunction for Efficient and Stable Solar Cells
摘要： All-inorganic perovskite (CsPbX3, X=Br or I) solar cells demonstrate superior stability while the power conversion efficiency (PCE) lags behind the organic-inorganic hybrid counterparts mainly due to the limitation of narrow absorption bands. To broaden its absorption spectrum and improve its PCE, all-inorganic perovskite/organic integrated solar cells utilizing CsPbI2Br as ultraviolet-visible light absorber and PBDTTT-E-T:IEICO as near-infrared light absorber are demonstrated in this work. The integrated solar cells exhibit a broadened photo-response to over 900 nm attributing to the integration of PBDTTT-E-T:IEICO. The additional absorption enhances the short-circuit current density from 14.78 mA/cm2 to 15.98 mA/cm2, resulting greatly improved PCE of 14.03% for integrated solar cells, much higher than that of the control perovskite solar cells (12.53%) and organic solar cells (7.51%). In-depth understanding of the charge transfer dynamic process in CsPbI2Br/PBDTTT-E-T:IEICO film is comprehensively analyzed by photoinduced transient absorption spectroscopy. Furthermore, the air stability and thermal stability of the integrated solar cells are greatly enhanced. For unencapsulated integrated solar cells, the PCE still preserve 95% of its initial value after aging for 300 hours in an ambient environment and the PCE retains about 90% of its original value even after aged at 85 ℃ for 180 hours in nitrogen.
关键词： light-harvesting,perovskite solar cell,stability,all-inorganic perovskite,integrated solar cell
更新于2025-09-12 10:27:22