Mechanism of the operational effect of black spot growth in OLEDs
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- 作者：Peter van de Weijera ; peter.vandeweijer@tno.nl" class="auth_mail" title="E-mail the corresponding author ; Kangbo Lub ; Richard R. Janssenc ; Suzanne H.P.M. de Wintera ; Hylke B. Akkermana
- 关键词：OLED ; Black spots ; Lifetime ; Degradation ; Water ingress ; Operational effect
- 刊名：Organic Electronics
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：37
- 期：Complete
- 页码：155-162
- 全文大小：739 K
文摘
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Black spots in OLEDs with PEDOT:PSS hole-injection layer grow faster during operation than in shelf.
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In shelf water penetrating through pinholes is partly captured by PSS to form H3O+.
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During operation the applied electric field causes transport of H3O+ to the cathode.
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Loss of protons from PSS results in local oxidation of PEDOT, as measured by RAMAN.