| Title: | A pyrrolopyridazinedione-based copolymer for fullerene-free organic solar cells |
|---|
| Authors: | Knall, Astrid-Caroline (Author)
Rabensteiner, Samuel (Author)
Hoefler, Sebastian F. (Author)
Reinfelds, Matiss (Author)
Hobisch, Mathias (Author)
Ehmann, Heike M. A. (Author)
Pastukhova, Nadiia (Author)
Pavlica, Egon (Author)
Bratina, Gvido (Author)
Hanzu, Illie (Author)
Wen, Shuguang (Author)
Yang, Renqiang (Author)
Trimmel, Gregor (Author)
Rath, Thomas (Author) |
|---|
| Files: | This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS.  |
|---|
| Language: | English |
|---|
| Work type: | Not categorized (r6) |
|---|
| Tipology: | 1.01 - Original Scientific Article |
|---|
| Organization: | UNG - University of Nova Gorica |
|---|
| Abstract: | The recent success of non-fullerene acceptors in organic photovoltaics also entails a change in the requirements to the polymer donor in terms of optical and morphological properties leading to a demand for novel conjugated polymers. Herein, we report on the synthesis of a 1,4-bis-(thiophene-2-yl)-pyrrolopyridazinedione based copolymer with 2-ethylhexyl substituents on the pyrrolopyridazinedione moiety. A 2D conjugated benzodithiophene (BDT) was chosen as comonomer. The resulting copolymer T-EHPPD-T-EHBDT showed a molecular weight of 10.2 kDa, an optical band gap of 1.79 eV, a hole mobility of 1.8 × 10−4 cm2 V−1 s−1 and a preferred face-on orientation with regard to the substrate. The comparably wide band gap as well as the determined energy levels (HOMO: −5.47 eV, LUMO: −3.68 eV) match well with the narrow band gap non-fullerene acceptor ITIC-F, which was used as the acceptor phase in the bulk heterojunction absorber layers in the investigated solar cells. The solar cells, prepared in inverted architecture, revealed power conversion efficiencies up to 7.4% using a donor:acceptor ratio of 1 : 1 in the absorber layer. |
|---|
| Keywords: | non-fullerene solar cells, charge transport, charge mobility, power conversion efficiency |
|---|
| Year of publishing: | 2021 |
|---|
| Number of pages: | 1001-1009 |
|---|
| Numbering: | 45 |
|---|
| COBISS_ID: | 48862979 |
|---|
| URN: | URN:SI:UNG:REP:5TLY9IH1 |
|---|
| DOI: | 10.1039/D0NJ04573J |
|---|
| Views: | 1690 |
|---|
| Downloads: | 0 |
|---|
| Metadata: |     |
|---|
| Categories: | Document is not linked to any category. |
|---|
|
:
|
|
|---|
| | | | Average score: | (0 votes) |
|---|
| Your score: | Voting is allowed only for logged in users. |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |