Kyung Hee University · Engineering
Professor Ramchandra Pode's research lab specializes in the development of advanced optoelectronic materials and devices, with a primary focus on organic light-emitting diodes (OLEDs), particularly top-emitting configurations for flat-panel displays. The lab investigates transparent conducting electrodes, rare-earth doped phosphors for efficient luminescence, and radiation-resistant materials to enhance device stability under harsh environmental conditions such as UV exposure. Key research directions include energy transfer mechanisms in phosphors, low-cost synthesis techniques like combustion synthesis, and the integration of novel electron transport layers to improve device performance and longevity.
Figures are computed from collected data and may differ slightly.
We have fabricated a transparent conducting double-layer metal electrode for top emission organic light-emitting devices which consists of thin layers of Ca and Ag metals of different thicknesses, deposited by the vacuum evaporation technique. The process is clean and does not damage the underlaying organic layers. High optical transparency over 70%, low reflectivity (14%) in the visible region, and low electrical sheet resistance (12 ohms/square) in Ca(10 nm)–Ag(10 nm) structures are reported.
Luminescence of Bi3+ and Bi3+ + Eu3+ in calcium tungstate powder prepared by the solid state diffusion method has been reported. The excitation and emission bands in CaWO4 and CaWO4:Bi3+ coincide and appear at 256 and 430.5 nm, respectively. The 430.5 nm emission band is ten times stronger in the latter case (for 1 mol% Bi3+) than in the former case. The Eu3+ emission was observed at 619 nm in CaWO4:Eu3+ (1 mol%). The Eu3+ emission intensity increased significantly (about 37 times) with the addi
Doubly doped YVO4:Pb2+, Eu3+ red phosphor materials with fixed Eu3+ concentration (5 mol%) and varying Pb2+ concentration were prepared via a self-propagating (combustion) synthesis. This consisted of bringing a saturated aqueous solution of the desired metal salts and a suitable organic fuel to the boil, until the mixture ignited and a self-sustaining and rather fast combustion reaction initiated, resulting in dry, amorphous or usually crystalline fine particles of the desired material. The for
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