Abstract
Tandem solar cells provide an effective way to harvest a broader spectrum of solar radiation by combining two or more solar cells with different absorption ranges. However, for polymer solar cells (PSCs), the performance of tandem devices lags behind single-layer cells mainly due to the lack of a high-performance low-bandgap polymer with appropriate spectral response range. Here, we demonstrate a novel low bandgap conjugated polymer (~1.44 eV) specifically suitable for tandem structure. In the single-layer device, power conversion efficiency (PCE) of 6.5% was achieved. When the polymer was applied to tandem solar cells, we demonstrated a NREL certified PCE of 8.62%[1]. Further optimization on materials and devices of this system has lead to record breaking efficiency of 10.6%. Furthermore, the tandem devices show excellent stability due both to the intrinsic stability of the polymer and the advanced device structure.
Original language | English |
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Title of host publication | Optical Processes in Organic Materials and Nanostructures |
Volume | 8474 |
DOIs | |
Publication status | Published - 1 Dec 2012 |
Externally published | Yes |
Event | Optical Processes in Organic Materials and Nanostructures - San Diego, CA, United States Duration: 12 Aug 2012 → 15 Aug 2012 |
Conference
Conference | Optical Processes in Organic Materials and Nanostructures |
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Country/Territory | United States |
City | San Diego, CA |
Period | 12/08/12 → 15/08/12 |
Keywords
- Low bandgap polymer
- Polymer solar cell
- Tandem polymer solar cell
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering