2022
DOI: 10.1021/acsami.2c10059
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Organic Photovoltaic Cells Based on Nonhalogenated Polymer Donors and Nonhalogenated A-DA′D-A-Type Nonfullerene Acceptors with High VOC and Low Nonradiative Voltage Loss

Abstract: Compared with other all-inorganic/organic–inorganic hybrid solar cells, the large voltage loss (V loss) of organic photovoltaic (OPV) cells, especially the nonradiative voltage loss (ΔV nonrad), limited the further improvement of performance. Although A-DA′D-A-type Y-series nonfullerene acceptors (NFAs) largely improve the power conversion efficiencies (PCEs) to 18%, the open-circuit voltage (V OC) of this kind of material was still restricted to below 1.0 V. Herein, we designed and synthesized a narrow bandga… Show more

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Cited by 20 publications
(9 citation statements)
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“…By comparison, PM7:DTSiC-2M- and PM7:DTSiCODe-4F-based binary blends display a relatively smooth roughness with R q values of 3.29 and 1.78 nm, respectively. The higher R q values indicate stronger crystalline nature and large domain size of blend morphology, better exciton dissociation, enhanced phase separation, and increased charge transfer, which contribute to improved J sc and FF. , From the phase and three-dimensional (3D) topological images of DTSiC-4F-based binary/ternary blends, the defined phase separation of the donors and acceptors with compact interpenetrating frameworks can be observed.…”
Section: Resultsmentioning
confidence: 99%
“…By comparison, PM7:DTSiC-2M- and PM7:DTSiCODe-4F-based binary blends display a relatively smooth roughness with R q values of 3.29 and 1.78 nm, respectively. The higher R q values indicate stronger crystalline nature and large domain size of blend morphology, better exciton dissociation, enhanced phase separation, and increased charge transfer, which contribute to improved J sc and FF. , From the phase and three-dimensional (3D) topological images of DTSiC-4F-based binary/ternary blends, the defined phase separation of the donors and acceptors with compact interpenetrating frameworks can be observed.…”
Section: Resultsmentioning
confidence: 99%
“…First, we extracted E g values for the blend films from the EQE curve; the values for the YCH3- and YCF3-based devices were calculated to be 1.502 and 1.419 eV, respectively. These values are slightly larger than those of the many reported BT-core-based NFAs, which results from the upshifted LUMOs of YCH3 and YCF3 due to a relatively weaker electron-accepting BTA core . The FTPS EQE and EQE EL are shown in Figures S11 and S12, respectively, and the calculated Δ E , Δ E 1 , Δ E 2 , and Δ E 3 values are given in Figure F and Table S3.…”
mentioning
confidence: 80%
“…These values are slightly larger than those of the many reported BT-core-based NFAs, which results from the upshifted LUMOs of YCH3 and YCF3 due to a relatively weaker electron-accepting BTA core. 55 The FTPS EQE and EQE EL are shown in Figures S11 and S12, respectively, and the calculated ΔE, ΔE 1 , ΔE 2 , and ΔE 3 values are given in Figure 3F and Table S3. Both devices exhibited almost identical ΔE 1 values at about 0.26 eV, but they showed the inverse trend in ΔE 2 and ΔE 3 .…”
mentioning
confidence: 99%
“…This has increased the PCE of non-fused fullerene-free organic solar cells, with some cells reaching efficiencies of up to 15% under optimal conditions. [24][25][26][27][28] Moreover, through the use of new encapsulation materials and improved device designs, researchers have been able to extend the stability and durability of non-fused fullerene-free organic solar cells. [29][30][31][32][33] Overall, nonfused organic solar cells have the potential of promising efficiency, economical production, as well as exibility in applications, making them potential candidates to play a signicant role in the future of solar energy.…”
Section: Introductionmentioning
confidence: 99%