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- Title
Low-Bandgap DPP-Based Quinoxaline with Extended EQE and Low Energy Loss for Efficient Polymer Solar Cells.
- Authors
Shah, Muhammad Naeem; Yang, Yatao; Sohail, Muhammad; Pathipati, Srinivasa Rao; Pan, Xiaofang
- Abstract
In this study, we have designed and synthesized a low-bandgap polymer, DPP-Qx, using quinoxaline (Qx), a non-alkylated weak acceptor, with diketopyrrolopyrrole (DPP) as an electron donor. The incorporation of Qx into DPP leads to the highest occupied molecular orbital level at −5.1 eV with a narrow optical bandgap (1.25 eV). The synthesized polymer is utilized in photovoltaics, and the photovoltaic properties are studied. This DPP-Qx with fullerene acceptors in polymer solar cells (PSCs) exhibits efficiency of 3.26%. Moreover, a minimum energy loss of 0.57 eV along with high extended external quantum efficiency is achieved with the DPP-Qx electron donor. The thermal, electrical and optical properties, energy levels and hole mobility of the synthesized polymer are studied and discussed.
- Subjects
SOLAR cells; ENERGY dissipation; FRONTIER orbitals; ELECTRON donors; QUINOXALINES; POLYMERS; HOLE mobility
- Publication
Journal of Electronic Materials, 2021, Vol 50, Issue 8, p4488
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-021-08868-x