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Doping ZnO with Water/Alcohol-Soluble Small Molecules as Electron Transport Layers for Inverted Polymer Solar Cells
Abstract
By doping ZnO with porphyrin small molecules (FNEZnP-OE and FNEZnP-T) as cathode electron transport layers (ETLs), the inverted polymer solar cells (i-PSC) with PTB7:PC 71 BM (PTB7: polythieno[3,4-b]-thiophene-co-benzodithiophene, PC 71 BM:[6, 6]-phenyl-C 71 -butyric acid methyl ester) as the active materials exhibit enhanced device performance. While the power conversion efficiency (PCE) of the PSCs with pure ZnO ETL is 7.52%, that of the devices with FNEZnP-T-doped ZnO ETL shows a slightly improved PCE of 8.09%, and that of the PSCs with FNEZnP-OE-doped ZnO ETL is further enhanced up to 9.24% with an over 20% improvement compared to that with pure ZnO ETL. The better performance is contributed by the better interfacial contact and reduced work function induced by 9,9-bis(30-(N,N-dimethylamino)propyl)-2,7-fluorenes and 3,4-bis(2-(2-methoxy-ethoxy)-ethoxy)-phenyls in the porphyrin small molecules. More importantly, the PCE is still higher than 8% even when the thickness of FNEZnP-OE-doped ZnO ETL is up to 110 nm, which are important criteria for eventually making organic photovoltaic modules with roll-to-roll coat processing.
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J7 used as a cathode interfacial layer for PTB7/PC71BM achieved an improved PCE of 8.09% (Voc 0.75 V, Jsc 15.20 mA cm-2, FF 70.94%).
“The same group used J7 (Fig. 19) as a cathode interfacial layer for PTB7/PC71BM and achieved an improved PCE of 8.09% ( V oc ¼ 0.75 V, J sc ¼ 15.20 mA cm 2 , and FF ¼ 70.94%). 156”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [156]
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Metadata
- Authors
- Liu, C., Zhang, L., Xiao, L., Peng, X., & Cao, Y.
- Affiliations
- State Key Laboratory of Luminescent Materials and Devices (CN)
- Corresponding author
- Peng, Xiaobin
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-10-07
- Volume
- 8
- Issue
- 41
- Pages
- 28225-28230
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2529659885
- Cited by
- 35
- References
- 33
- Citations by year
- 2026: 2 · 2023: 4 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 8 · 2018: 7 · 2017: 9
- FWCI
- 3.69
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ACS Applied Materials & Interfaces (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Ministry of Science and Technology of the People's Republic of China (2010DFA52150, 2013DFG52740)
- National Natural Science Foundation of China (51073060, 51473053)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Thin-Film Transistor Technologies
- Keywords
- zinc oxide, electron transport layer, inverted polymer solar cells, doping, work function reduction, interfacial contact, PTB7:PC71BM, power conversion efficiency, roll-to-roll processing, organic solar cells
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