CARRIERS INJECTION AND TRANSPORT IN SMALL MOLECULE ORGANIC LIGHT EMITTING DIODES (OLED)

CARRIERS INJECTION AND TRANSPORT IN SMALL MOLECULE ORGANIC LIGHT EMITTING DIODES (OLED)

Bibliographic Details
Main Author: MU, HAICHUAN
Language:English
Published: University of Cincinnati / OhioLINK 2007
Subjects:
Carriers
Injection
Transport
OLED
Temperature dependence
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ucin1163803998
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ucin11638039982021-08-03T06:11:40Z CARRIERS INJECTION AND TRANSPORT IN SMALL MOLECULE ORGANIC LIGHT EMITTING DIODES (OLED) MU, HAICHUAN Carriers Injection Transport OLED Temperature dependence Our study focuses on the understanding of the mechanisms of charge injection and transport in small molecule organic light emitting diodes (OLED). One contribution of this work is the development of a new, indirect method to study carrier mobility in fabricated Alq3. The results from this method are consistent with those obtained from the large signal method, such as time of flight and transit delay time and no any thickness dependence of the carrier mobility was observed. Therefore, such modulation reduced the interface and trap charging effect due to its small signal nature, and complements the large signal method. The electron mobility has been studied over temperature with a new modulation method which is effective for devices. An unexpected mobility maximum, correlated in temperature with the PL efficiency maximum and the onset of degradation in the EL efficiency, was observed. The EL efficiency (which combines mobility and charge balance terms) is attributed to the combination of a monotonically falling charge balance term with a PL efficiency maximum. The temperature dependent carriers transport mode is also investigated.On the way to discussing mobility in organic devices, a number of studies were performed to optimize the performance of our thermally fabricated devices. Thin film device morphology was optimized. The EL performance of the green light OLED with various electrode structures is investigated and the brightness >1700cd/m2 and the EL efficiency >8cd/A in a thermally were obtained due to the enhancement of carrier injections resulted from the modified electrode structures. For the achievement of Full-color emission, red and blue light OLED were also fabricated and the dependence of the EL performance on the dopant and matrix organic layer were demonstrated. 2007-04-04 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1163803998 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1163803998 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Carriers
Injection
Transport
OLED
Temperature dependence
spellingShingle Carriers
Injection
Transport
OLED
Temperature dependence
MU, HAICHUAN
CARRIERS INJECTION AND TRANSPORT IN SMALL MOLECULE ORGANIC LIGHT EMITTING DIODES (OLED)
author MU, HAICHUAN
author_facet MU, HAICHUAN
author_sort MU, HAICHUAN
title CARRIERS INJECTION AND TRANSPORT IN SMALL MOLECULE ORGANIC LIGHT EMITTING DIODES (OLED)
title_short CARRIERS INJECTION AND TRANSPORT IN SMALL MOLECULE ORGANIC LIGHT EMITTING DIODES (OLED)
title_full CARRIERS INJECTION AND TRANSPORT IN SMALL MOLECULE ORGANIC LIGHT EMITTING DIODES (OLED)
title_fullStr CARRIERS INJECTION AND TRANSPORT IN SMALL MOLECULE ORGANIC LIGHT EMITTING DIODES (OLED)
title_full_unstemmed CARRIERS INJECTION AND TRANSPORT IN SMALL MOLECULE ORGANIC LIGHT EMITTING DIODES (OLED)
title_sort carriers injection and transport in small molecule organic light emitting diodes (oled)
publisher University of Cincinnati / OhioLINK
publishDate 2007
url http://rave.ohiolink.edu/etdc/view?acc_num=ucin1163803998
work_keys_str_mv AT muhaichuan carriersinjectionandtransportinsmallmoleculeorganiclightemittingdiodesoled
_version_ 1719432490034135040

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