Journal article
The effect of molecular geometry on the photovoltaic property of diketopyrrolopyrrole based non-fullerene acceptors
The non-fullerene acceptors with different geometric structures have great impact on light absorption, exciton dissociation, and charge transportation in the active layer of organic solar cells (OSCs). In this paper, we designed and synthesized two diketopyrrolopyrrole based non-fullerene acceptors, Ph(DPP)2 and PhDMe(DPP)2 with similar chemical components but different molecular geometries.
Due to its more twisted molecular conformation, PhDMe(DPP)2 shows more blue-shifted absorption bands, higher electron mobility, and better miscibility with the polymer donor poly(3-hexylthiophene) (P3HT) while compared to Ph(DPP)2. Therefore, the resulting P3HT:PhDMe(DPP)2 based OSCs shows a better power conversion efficiency (PCE) of 0.65%, higher than that from P3HT:Ph(DPP)2 based OSCs (0.48%), which can be ascribed to more efficient exciton dissociation and electron transportation in the active layer of P3HT:PhDMe(DPP)2.
Language: | English |
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Year: | 2015 |
Pages: | 249-254 |
ISSN: | 18793290 and 03796779 |
Types: | Journal article |
DOI: | 10.1016/j.synthmet.2015.02.038 |
ORCIDs: | 0000-0001-8728-7486 |
Diketopyrrolopyrrole Diketopyrrolopyrroles Dissociation Electromagnetic wave absorption Electron transportation Excitons Fullerenes Geometric structure Geometry Light absorption Molecular conformation Molecular structure Non-fullerene acceptors Organic solar cell Organic solar cells Photovoltaic effects Photovoltaic property Power conversion efficiencies SDG 7 - Affordable and Clean Energy Solar cells