Journal
ACS ENERGY LETTERS
Volume 4, Issue 9, Pages 2032-2039Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.9b01294
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Funding
- Energy Materials and Surface Sciences Unit of the Okinawa Institute of Science and Technology Graduate University
- GIST Proof of Concept (POC) Program
- GIST R&D Cluster Research Program
- JSPS KAKENHI [JP18K05266, 17K14551]
- Grants-in-Aid for Scientific Research [17K14551] Funding Source: KAKEN
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Carbon electrode-based perovskite solar cells (PSCs) with low-cost and long-term stability have been recognized as a competitive candidate toward future practical applications. However, energy level mismatch and ineffective hole extraction at the carbon electrode/perovskite interface limit device performance. Herein, we develop a low-cost carbon-based electrode that utilizes a cheap small-molecule semiconductor copper phthalocyanine (CuPc) as both the interface modifier and dopant. The resultant planar PSC yields a power conversion efficiency of 14.8%, similar to 30% higher than that based on the bare carbon electrode. This is due to higher work function and better hole extraction properties of the CuPc-modified carbon electrodes. The simple modification process of the carbon electrode has potential applications for large-scale fabrication. We further applied such electrodes in large-area solar modules and flexible solar cells, demonstrating their capability of upscaling and flexibility.
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