Hybrid polymer-quantum dot based single active layer structured multi-functional device: Organic bistable device, LED and Photovoltaic cells

Author

Son, Dong Ick ; Park, Dong Hee ; Won, Byoung Wook K ; Choi, Won Kook

Author_Institution

Future Convergence Technol. Div., Korea Inst. of Sci. & Technol., Seoul, South Korea

fYear

2011

fDate

18-21 Oct. 2011

Firstpage

125

Lastpage

132

Abstract

We demonstrate the hybrid polymer-quantum dot based multi-functional device (Organic bistable devices, Light-emitting diode, and Photovoltaic cell) with a single active-layer structure consisting of CdSe/ZnS semiconductor quantum-dots (QDs) dispersed in a poly N-vinylcarbazole (PVK) and 1,3,5-tirs-(N-phenylbenzimidazol-2-yl) benzene (TPBi) fabricated on indium-tin-oxide (ITO)/glass substrate by using a simple spin coating technique. The multi-functionality of the device as Organic bistable device (OBD), Light Emitting Diode (LED), and Photovoltaic cell can be successfully achieved by adding an electron transport layer (ETL) TPBi to OBD for attaining the functions of LED and Photovoltaic cell in which the lowest unoccupied molecular orbital (LUMO) level of TPBi is positioned at the energy level between the conduction band of CdSe/ZnS and LiF/Al electrode (band-gap engineering).

Keywords

II-VI semiconductors; cadmium compounds; conduction bands; electrodes; light emitting diodes; molecular electronic states; photovoltaic cells; polymers; semiconductor quantum dots; spin coating; wide band gap semiconductors; 1,3,5-tirs-(N-phenylbenzimidazol-2-yl) benzene; CdSe-ZnS; ITO; LED; SiO₂; conduction band; dispersion; electrode; electron transport layer; energy level; hybrid polymer-quantum dot; indium-tin-oxide-glass substrate; light-emitting diode; molecular orbital level; organic bistable device; photovoltaic cells; poly N-vinylcarbazole; semiconductor quantum-dots; simple spin coating technique; single active layer structured multifunctional device; Artificial intelligence; Electrodes; Indium tin oxide; Light emitting diodes; Photonic band gap; Polymers; Tunneling;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology Materials and Devices Conference (NMDC), 2011 IEEE

Conference_Location

Jeju

Print_ISBN

978-1-4577-2139-7

Type

conf

DOI

10.1109/NMDC.2011.6155325

Filename

6155325