Publication:
Optimizing the PMMA electron-blocking layer of quantum dot light-emitting diodes

Дата
2021
Авторы
Alexandrov, A.
Lypenko, D.
Zvaigzne, M.
Tkach, A.
Nabiev, I.
Samokhvalov, P.
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Научные группы
Организационные подразделения
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Организационная единица
Инженерно-физический институт биомедицины
Цель ИФИБ и стратегия развития – это подготовка высококвалифицированных кадров на базе передовых исследований и разработок новых перспективных методов и материалов в области инженерно-физической биомедицины. Занятие лидерских позиций в биомедицинских технологиях XXI века и внедрение их в образовательный процесс, что отвечает решению практикоориентированной задачи мирового уровня – диагностике и терапии на клеточном уровне социально-значимых заболеваний человека.
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Аннотация
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.Quantum dots (QDs) are promising candidates for producing bright, color-pure, costefficient, and long-lasting QD-based light-emitting diodes (QDLEDs). However, one of the significant problems in achieving high efficiency of QDLEDs is the imbalance between the rates of charge-carrier injection into the emissive QD layer and their transport through the device components. Here we investigated the effect of the parameters of the deposition of a poly (methyl methacrylate) (PMMA) electron-blocking layer (EBL), such as PMMA solution concentration, on the characteristics of EBL-enhanced QDLEDs. A series of devices was fabricated with the PMMA layer formed from acetone solutions with concentrations ranging from 0.05 to 1.2 mg/mL. The addition of the PMMA layer allowed for an increase of the maximum luminance of QDLED by a factor of four compared to the control device without EBL, that is, to 18,671 cd/m2, with the current efficiency increased by an order of magnitude and the turn-on voltage decreased by ~1 V. At the same time, we have demonstrated that each particular QDLED characteristic has a maximum at a specific PMMA layer thickness; therefore, variation of the EBL deposition conditions could serve as an additional parameter space when other QDLED optimization approaches are being developed or implied in future solid-state lighting and display devices.
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Optimizing the PMMA electron-blocking layer of quantum dot light-emitting diodes / Alexandrov, A. [et al.] // Nanomaterials. - 2021. - 11. - № 8. - 10.3390/nano11082014
URI
https://www.doi.org/10.3390/nano11082014
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85112650899&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000690185300001
 https://openrepository.mephi.ru/handle/123456789/24472
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