Band alignment in organic light emitting diodes - On the track of thickness dependent onset voltage shifts

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• 作者：Maybritt Kü ; hn^a ; ^b ; ^{mkuehn@surface.tu-darmstadt.de} ; Christof Pflumm^d ; Tobias Glaser^a ; ^c ; Philipp Harbach^d ; Wolfram Jaegermann^a ; ^b ; Eric Mankel^a ; ^b
• 关键词：Organic light emitting diodes ; Interphase experiments ; Onset voltage shift ; Photoelectron spectroscopy ; Angle dependent IR-measurements
• 刊名：Organic Electronics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：41
• 期：Complete
• 页码：79-90
• 全文大小：2893 K
• 卷排序：41

文摘

Organic-organic heterojunctions in two OLEDs are investigated using XPS/UPS. Band bending at the emission layer interfaces is observed. Thickness dependent onset voltage shifts still exist in case of hole-only devices. Band bending upwards is found as origin of thickness dependent onset voltage shifts.