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Abstract
Damage-free transfer of nanogratings as waveguide mode extraction elements onto the top of top-emission organic light-emitting devices (OLEDs) was realized with the assistance of cyclic olefin copolymer molds. Photoluminescence and electroluminescence measurements together with transfer matrix calculations were used to identify the extracted waveguide modes. The presented one-step, wet-free, and etchless nanotransfer approach can avoid damage on the top-emission OLED structure and does not adversely affect the OLED performance. It offers the possibility for the independent optimization of OLED fabrication and nanofabrication, and has potential applications in organic optoelectronic devices, especially top-emission OLEDs.
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