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- W4386002139 abstract "In order to achieve efficient organic photovoltaics (OPVs), a ternary strategy was adopted with the efficient long-wavelength light-absorption donor material of PSBTBT as the third component material (guest donor) and the D18-Cl:BTP-eC9 binary film as the host photoactive layer, which facilitates the acquisition of absorption spectra complementary to those of D18-Cl and BTP-eC9. The PL spectrum of D18-Cl was covered by the absorption spectrum of PSBTBT, which further supports the energy transfer from D18-Cl to PSBTBT. In addition, the addition of a small amount of PSBTBT to the D18-Cl:BTP-eC9 binary film slightly changed the bulk and surface morphology of the photoactive layer, while appropriate phase separation size and a smooth surface could be achieved for both the D18-Cl:BTP-eC9 binary film and the optimized ternary film. Thus, with 10% PSBTBT as the third component material (D18-Cl/PSBTBT/BTP-eC9 ratio of 0.9:0.1:1.2), the ternary OPV shows a higher power conversion efficiency (PCE) of 17.35%. The improvement of photovoltaic performance is due to the short-circuit current density (JSC) enhancement from 24.65 to 26.23 mA cm–2, even though the open-circuit voltage (VOC) weakly decreased from 0.905 to 0.900 V. This work provides an effective method to find a guest polymer that matches the host binary photoactive layer, broadens the absorption spectrum, and provides efficient energy transfer within both donor materials." @default.
- W4386002139 created "2023-08-20" @default.
- W4386002139 creator A5010816404 @default.
- W4386002139 creator A5048740840 @default.
- W4386002139 date "2023-08-19" @default.
- W4386002139 modified "2023-10-07" @default.
- W4386002139 title "Nonfullerene Ternary Organic Photovoltaics with Long-Wavelength Light-Absorption Guest Donor Materials to Improve Photovoltaic Performance" @default.
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- W4386002139 doi "https://doi.org/10.1021/acsapm.3c01639" @default.
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