| Full text | |
| Author(s): |
Amorim, C. A.
[1]
;
Cavallari, M. R.
[2]
;
Santos, G.
[2]
;
Fonseca, F. J.
[2]
;
Andrade, A. M.
[3]
;
Mergulhao, S.
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Sao Carlos, Dept Fis, Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Escola Politecn, BR-09500900 Sao Paulo - Brazil
[3] Univ Sao Paulo, Inst Eletrotecn & Energia, BR-09500900 Sao Paulo - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Journal of Non-Crystalline Solids; v. 358, n. 3, p. 484-491, FEB 1 2012. |
| Web of Science Citations: | 42 |
| Abstract | |
Charge transport and shelf-degradation of MEH-PPV thin-films were investigated through stationary (e.g. current versus voltage - JxV) and transient (e.g. Time-of-Flight - ToF, Dark-Injection Space-Charge-Limited Current - DI-SCLC, Charge Extraction by Linearly Increasing Voltage - CELN) current techniques. Charge carrier mobility in nanometric films was best characterized through JxV and DI-SCLC. It approaches 10(-6) cm(2)Ns under a SCLC regime with deep traps for light-emitting diode applications. ToF measurements performed on micrometric layers (i.e. - 3 mu m) confirmed studies in 100 nm-thick films as deposited in OLEDs. All results were comparable to a similar poly(para-phenylene vinylene) derivative, MDMO-PPV. Electrical properties extracted from thin-film transistors demonstrated mobility dependence on carrier concentration in the channel (similar to 10(-7)-10(-4) cm(2)/Vs). At low accumulated charge levels and reduced free carrier concentration, a perfect agreement to the previously cited techniques was observed. Degradation was verified through mobility reduction and changes in trap distribution of states. (C) 2011 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 09/05589-7 - Study and develoment of organic LEDs, solar cells, thin-film transistors and sensors based on semiconductor polymers |
| Grantee: | Adnei Melges de Andrade |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 07/06064-0 - Development of a manufacturing methodology for organic thin film transistors |
| Grantee: | Marco Roberto Cavallari |
| Support Opportunities: | Scholarships in Brazil - Master |