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A low-cost and low-temperature processable zinc oxide-polyethylenimine (ZnO:PEI) nano-composite as cathode buffer layer for organic and perovskite solar cells
- Source :
- Organic Electronics. 38:150-157
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- Nanocomposite buffer layer based on metal oxide and polymer is merging as a novel buffer layer for organic solar cells, which combines the high charge carrier mobility of metal oxide and good film formation properties of polymer. In this work, a nanocomposite of zinc oxide and a commercialized available polyethylenimine (PEI) was developed and used as the cathode buffer layer (CBL) for the inverted organic solar cells and p-i-n heterojunction perovskite solar cells. The cooperation of PEI in nano ZnO offers a good film forming ability of the composite material, which is an advantage in device fabrication. In addition, power conversion efficiency (PCE) of the ZnO:PEI CBL based device was also improved when compared to that of ZnO-only and PEI-only devices. The highest PCE of P3HT:PC 61 BM and PTB7-Th:PC 61 BM devices reached to 3.57% and 8.16%, respectively. More importantly, there is no obvious device performance loss with the increase of the layer thickness of ZnO:PEI CBL to 60 nm in organic solar cells, which is in contrast to the PEI based devices, whose device performance decreases dramatically when the PEI layer thickness is higher than 6 nm. Such a nano composite material is also applicable in inverted heterojunction perovskite solar cells. A PCE of 11.76% was achieved for the perovskite solar cell with a thick ZnO:PEI CBL (150 nm) CBL, which is around 1.71% higher than that of the reference cell without CBL, or with ZnO CBL. In addition, stability of the organic and perovskite solar cells having ZnO:PEI CBL was also found to be improved in comparison with that of PEI based device.
- Subjects :
- Polyethylenimine
Nanocomposite
Materials science
Organic solar cell
Open-circuit voltage
Oxide
Perovskite solar cell
Heterojunction
Nanotechnology
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Electronic, Optical and Magnetic Materials
Biomaterials
chemistry.chemical_compound
Chemical engineering
chemistry
Materials Chemistry
Electrical and Electronic Engineering
0210 nano-technology
Perovskite (structure)
Subjects
Details
- ISSN :
- 15661199
- Volume :
- 38
- Database :
- OpenAIRE
- Journal :
- Organic Electronics
- Accession number :
- edsair.doi...........67022b225c92ee363bb6b158f764607c