journal article·2013-07

Band alignment of ZnO/CdSe quantum dots heterojunction determined by ultraviolet photoelectron spectroscopy using synchrotron radiation

Ruifeng Li, Chunfeng Cai, Lian Hu, Huizhen Wu, Wenhua Zhang, Junfa Zhu

Publisher page

Abstract

Abstract Band alignments of ZnO/CdSe nanocrystal quantum-dots (NQDs) heterojunctions are determined by ultraviolet photoelectron spectroscopy using synchrotron radiation source. To obtain ideal heterojunction interface, 1,2-ethanedithiol was used for CdSe NQDs as a ligand substitute. A type II band alignment of the ZnO/CdSe NQDs heterojunctions with changeable band offsets by varying the sizes of CdSe NQDs is concluded. The tunable band alignment of ZnO/CdSe NQDs heterojunctions is beneficial to the improvement of the design and fabrication of quantum-dot-sensitized solar cells.
Source: openaire · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Quantum Dots Synthesis And Properties · Advanced Photocatalysis Techniques · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

References (25)

Show source-provided references
1. Quantum dot sensitized solar cells with improved efficiency prepared using electrophoretic deposition10.1021/nn1018208 ↗
2. Energy level alignment in CdS quantum dot sensitized solar cells using molecular dipoles10.1021/ja902770k ↗
3. Colloidal-quantum-dot photovoltaics using atomic-ligand passivation10.1038/nmat3118 ↗
4. Efficient, stable infrared photovoltaics based on solution-cast colloidal quantum dots10.1021/nn800093v ↗
5. Photosensitization of nanoporous TiO2 electrodes with InP quantum dots10.1021/la9713863 ↗
6. ZnO-based dye-sensitized solar cells10.1021/jp3010025 ↗
7. A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
8. Tuning energetic levels in nanocrystal quantum dots through surface manipulations10.1021/nl0732171 ↗
9. Dependence of the final-state effect on the coupling between a CdSe nanoparticle and its neighbors studied with photoemission spectroscopy10.1103/PhysRevB.75.115402 ↗
10. Size-dependent valence and conduction band-edge energies of semiconductor nanocrystals10.1021/nn201681s ↗
11. Valence band alignment at cadmium selenide quantum dot and zinc oxide (1⁡0⁡1¯⁡0) interfaces10.1021/jp7113434 ↗
12. Energetics of CdSe quantum dots adsorbed on TiO210.1021/jp2035955 ↗
13. Effects of bifunctional linker on the optical properties of ZnO nanocolumn-linker-CdSe quantum dots heterostructure10.1016/j.jcis.2011.03.002 ↗
14. Structural, optical, and electrical properties of self-assembled films of PbSe nanocrystals treated with 1,2-ethanedithiol10.1021/nn7003348 ↗
15. Band alignment determination of ZnO/PbSe heterostructure interfaces by synchrotron radiation photoelectron spectroscopy10.1209/0295-5075/99/37010 ↗
16. Plasmon-enhanced surface-state emission of CdSe quantum dots and its application to microscale luminescence patterns10.1021/jp210269m ↗
17. Schottky solar cells based on colloidal nanocrystal films10.1021/nl802476m ↗
18. A new class of capping ligands for CdSe nanocrystal synthesis10.1021/cm050799j ↗
19. Experimental determination of valence band offset at PbTe/CdTe (111) heterojunction interface by X-ray photoelectron spectroscopy10.1063/1.3028028 ↗
20. Ultraviolet-photoemission studies of formic acid decomposition on ZnO nonpolar surfaces
21. Characterization of indium tin oxide surfaces and interfaces using low intensity X-ray photoemission spectroscopy10.1063/1.2361089 ↗
22. The absolute energy positions of conduction and valence bands of selected semiconducting minerals10.2138/am-2000-0416 ↗
23. Electronic wave functions in semiconductor clusters: experiment and theory10.1021/j100403a003 ↗
24. Electronic structure of CdSe nanoparticles adsorbed on Au electrodes by an organic linker: fermi level pinning of the HOMO10.1021/jp9041167 ↗
25. Dye-sensitized solar cells10.1021/cr900356p ↗