Chiba Takayuki, Kumagai Daichi, Udagawa Kazuo, Watanabe Yuichiro, Kido Junji
Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.
Sci Rep. 2018 Jul 31;8(1):11472. doi: 10.1038/s41598-018-29806-8.
The rapid development of organic optoelectronic devices such as organic photovoltaics (OPVs) and organic light-emitting devices (OLEDs) is largely attributable to their advantageous properties of their large area, ultrathin thickness, flexiblility, transparency, and solution processability. Herein, we fabricate and characterize a dual mode OPV-OLED device with three-terminal structure comprising a polymer-based bulk-heterojunction inverted OPV unit and a top-emission white phosphorescent OLED unit back-to-back connected via intermediate metal alloy electrode. Sputter-deposited indium tin oxide was used as a transparent cathode of the inverted OPV unit, whereas Ag-doped Al served as a common OPV/OLED anode, allowing the decoupling of electricity generation and light mission functions. Notably, the doping of Al by Ag facilitated the reduction of surface roughness, allowing the above electrode to be used as a common anode and dramatically reducing the leakage current. Finally, the top-emission OLED unit featured an ultrathin layer of Ag-doped Mg as a semitransparent cathode. Thus, successful integration of the OPV-OLED elements results in the decoupling of electricity generation and light emission functionalities, achieving a power conversion efficiency of 3.4% and an external quantum efficiency of 9.9%.
有机光伏（OPV）和有机发光器件（OLED）等有机光电器件的快速发展很大程度上归因于它们具有大面积、超薄厚度、柔韧性、透明性和溶液可加工性等优势特性。在此，我们制备并表征了一种具有三端结构的双模OPV - OLED器件，该器件由基于聚合物的体异质结倒置OPV单元和顶部发射的白色磷光OLED单元背靠背通过中间金属合金电极连接而成。溅射沉积的氧化铟锡用作倒置OPV单元的透明阴极，而银掺杂的铝用作通用的OPV/OLED阳极，从而实现发电和发光功能的解耦。值得注意的是，银对铝的掺杂有助于降低表面粗糙度，使得上述电极能够用作通用阳极并显著降低漏电流。最后，顶部发射的OLED单元采用了一层超薄的银掺杂镁作为半透明阴极。因此，OPV - OLED元件的成功集成实现了发电和发光功能的解耦，功率转换效率达到3.4%，外量子效率达到9.9%。
