研究目的
To investigate the performance improvement of small molecules organic photovoltaics (SMPVs) by employing ternary strategy with PC71BM as morphology regulator.
研究成果
A 12.84% PCE is achieved from ternary SMPVs with DR3TSBDT:Y6:PC71BM (1.25:0.6:0.4, wt/wt) as active layers, resulting from the simultaneously increased JSC of 22.19 mA cm-2 and FF of 67.27% compared with two binary SMPVs. The well-optimized phase separation degree and efficient charge transport channels can be obtained by incorporating appropriate PC71BM as morphology regulator.
研究不足
The study focuses on the optimization of phase separation and molecular arrangement in ternary active layers. The potential limitations include the compatibility of materials and the reproducibility of device performance.
1：Experimental Design and Method Selection:
SMPVs were prepared with DR3TSBDT as donor, Y6 and PC71BM as acceptors. The ternary strategy was employed to optimize the phase separation degree of active layers.
2：Sample Selection and Data Sources:
A series of binary and ternary SMPVs were prepared with different PC71BM content in acceptors.
3：List of Experimental Equipment and Materials:
DR3TSBDT, Y6, PC71BM, and other materials for device fabrication.
4：Experimental Procedures and Operational Workflow:
Devices were fabricated by spin-coating method. The J-V characteristics under AM 1.5G, 100 mW cm-2 light illumination were measured.
5：5G, 100 mW cm-2 light illumination were measured.
Data Analysis Methods:
5. Data Analysis Methods: The photovoltaic parameters were extracted from J-V curves. The external quantum efficiency (EQE) spectra were measured to analyze the photon harvesting and charge collection efficiency.
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