Refine
Has Fulltext
- no (22)
Year of publication
- 2014 (22) (remove)
Document Type
- Article (22) (remove)
Language
- English (22)
Is part of the Bibliography
- yes (22)
Keywords
- organic solar cells (2)
- Bulk heterojunction (1)
- Carbon nitride (1)
- Efficiency optimization (1)
- Hybrid solar cells (1)
- Organic solar cells (1)
- Photocatalysis (1)
- RhB degradation (1)
- RhB photodegradation (1)
- SiO2 composite material (1)
- Tandem solar cells (1)
- ZnO (1)
- carbon nitride (1)
- charge carrier recombination (1)
- charge generation (1)
- charge transfer states (1)
- conjugated polymers (1)
- driving force (1)
- electrodes (1)
- excess energy (1)
- geminate recombination (1)
- metal-free photocatalysis (1)
- morphology (1)
- organic semiconductors (1)
- phosphonic acid (1)
- self-assembled monolayers (1)
- spectroelectrochemistry (1)
- surface modification (1)
- upconversion (1)
Institute
Zinc oxide (ZnO) is regarded as a promising alternative material for transparent conductive electrodes in optoelectronic devices. However, ZnO suffers from poor chemical stability. ZnO also has a moderate work function (WF), which results in substantial charge injection barriers into common (organic) semiconductors that constitute the active layer in a device. Controlling and tuning the ZnO WF is therefore necessary but challenging. Here, a variety of phosphonic acid based self-assembled monolayers (SAMs) deposited on ZnO surfaces are investigated. It is demonstrated that they allow the tuning the WF over a wide range of more than 1.5 eV, thus enabling the use of ZnO as both the hole-injecting and electron-injecting contact. The modified ZnO surfaces are characterized using a number of complementary techniques, demonstrating that the preparation protocol yields dense, well-defined molecular monolayers.