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• W2033711192 endingPage "929" @default.
• W2033711192 startingPage "923" @default.
• W2033711192 abstract "This article reports experimental studies on internal charge dissociation, transport, and collection by using magnetic field effects of photocurrent (MFEPC) and light-assisted dielectric response (LADR) in highly-efficient organic solar cells based on photovoltaic polymer PTB2 and PTB4 with intra-molecular “donor–acceptor” interaction. The MFEPC at low-field (< 150 mT) indicates that intra-molecular “donor-acceptor” interaction generates charge dissociation in un-doped PTB2 and PTB4 films, which is similar to that in lightly doped P3HT (Poly(3-hexylthiophene)) with 5 wt% PCBM (1-(3-methyloxycarbonyl)-propyl-1-phenyl (6,6) C61). After PTB2 and PTB4 are mixed with PCBM to form bulk-heterojunctions, the MFEPC at high-field (> 150 mT) reveals that the charge-transfer complexes formed at PTB2:PCBM and PTB4:PCBM interfaces have much lower binding energies due to stronger electron-withdrawing abilities, as compared to the P3HT:PCBM device, towards the generation of photocurrent. Furthermore, the light-assisted dielectric response: LADR indicates that the PTB2:PCBM and PTB4:PCBM solar cells exhibit larger capacitances relative to P3HT:PCBM device under photoexcitation. This reflects that the PTB2:PCBM and PTB4:PCBM bulk heterojunctions have more effective charge transport and collection than the P3HT:PCBM counterpart. As a result, our experimental results indicate that intra-molecular “donor-acceptor” interaction plays an important role to enhance charge dissociation, transport, and collection in bulk-heterojunction organic solar cells." @default.
• W2033711192 created "2016-06-24" @default.
• W2033711192 creator A5005274980 @default.
• W2033711192 creator A5017109982 @default.
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• W2033711192 date "2011-08-10" @default.
• W2033711192 modified "2023-09-26" @default.
• W2033711192 title "Intra-Molecular Donor-Acceptor Interaction Effects on Charge Dissociation, Charge Transport, and Charge Collection in Bulk-Heterojunction Organic Solar Cells" @default.
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• W2033711192 doi "https://doi.org/10.1002/aenm.201100304" @default.
• W2033711192 hasPublicationYear "2011" @default.
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