Cathodic-controlled and near-infrared organic upconverter for local blood vessels mapping

Chih Hsien Yuan, Chih Chien Lee, Chun Fu Liu, Yun Hsuan Lin, Wei Cheng Su, Shao Yu Lin, Kuan Ting Chen, Yan De Li, Wen Chang Chang, Ya Ze Li, Tsung Hao Su, Yu Hsuan Liu, Shun Wei Liu

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25 Citations (Scopus)


Organic materials are used in novel optoelectronic devices because of the ease and high compatibility of their fabrication processes. Here, we demonstrate a low-driving-voltage cathodic-controlled organic upconverter with a mapping application that converts near-infrared images to produce images of visible blood vessels. The proposed upconverter has a multilayer structure consisting of a photosensitive charge-generation layer (CGL) and a phosphorescent organic light-emitting diode (OLED) for producing clear images with a high resolution of 600 dots per inch. In this study, temperature-dependent electrical characterization was performed to analyze the interfacial modification of the cathodic-controlled upconverter. The result shows that the upconverter demonstrated a high conversion efficiency of 3.46% because of reduction in the injection barrier height at the interface between the CGL and the OLED.

Original languageEnglish
Article number32324
JournalScientific Reports
Publication statusPublished - Aug 31 2016
Externally publishedYes

ASJC Scopus subject areas

  • General


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