Thick OLED Structure (IMAGE)

Kyushu University

Thick OLED Structure

Caption

Researchers at Kyushu University developed thick organic light-emitting diodes (OLEDs) to ease manufacturing constraints and improve viewing angles. The organic emitting layer contained molecules that show efficient phosphorescence or thermally activated delayed fluorescence (TADF). Metal halide perovskite layers, which are transparent and easily carry electricity, were placed on both sides of the organic layer. The micrometer-thick OLEDs had very high external quantum efficiencies of up to 40%. Emission spectra were independent of viewing angles for OLEDs with appropriate perovskite thickness, contributing to OLED displays with no distortion of emission color at various viewing angles.

Credit

Toshinori Matsushima, Kyushu University

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