Flexible, highly efficient all-polymer solar cells

Taesu Kim, Jae-Han Kim, Tae Eui Kang, Changyeon Lee, Hyunbum Kang, Minkwan Shin, Cheng Wang, Biwu Ma, Unyong Jeong, Taek-Soo Kim () and Bumjoon J. Kim ()
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Taesu Kim: Korea Advanced Institute of Science and Technology (KAIST)
Jae-Han Kim: KI for the NanoCentury, KAIST
Tae Eui Kang: Korea Advanced Institute of Science and Technology (KAIST)
Changyeon Lee: Korea Advanced Institute of Science and Technology (KAIST)
Hyunbum Kang: Korea Advanced Institute of Science and Technology (KAIST)
Minkwan Shin: POSTECH
Cheng Wang: Advanced Light Source, Lawrence Berkeley National Laboratory
Biwu Ma: Florida State University
Unyong Jeong: POSTECH
Taek-Soo Kim: KI for the NanoCentury, KAIST
Bumjoon J. Kim: Korea Advanced Institute of Science and Technology (KAIST)

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract All-polymer solar cells have shown great potential as flexible and portable power generators. These devices should offer good mechanical endurance with high power-conversion efficiency for viability in commercial applications. In this work, we develop highly efficient and mechanically robust all-polymer solar cells that are based on the PBDTTTPD polymer donor and the P(NDI2HD-T) polymer acceptor. These systems exhibit high power-conversion efficiency of 6.64%. Also, the proposed all-polymer solar cells have even better performance than the control polymer-fullerene devices with phenyl-C61-butyric acid methyl ester (PCBM) as the electron acceptor (6.12%). More importantly, our all-polymer solar cells exhibit dramatically enhanced strength and flexibility compared with polymer/PCBM devices, with 60- and 470-fold improvements in elongation at break and toughness, respectively. The superior mechanical properties of all-polymer solar cells afford greater tolerance to severe deformations than conventional polymer-fullerene solar cells, making them much better candidates for applications in flexible and portable devices.

Date: 2015
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DOI: 10.1038/ncomms9547

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