Hanyang University · Engineering
Professor Bo Ram Lee's research lab specializes in advanced optoelectronic materials and devices, with a primary focus on solution-processable semiconductors for next-generation lighting and energy applications. Key research directions include the development of high-efficiency polymer and perovskite light-emitting diodes (PeLEDs), with an emphasis on defect passivation, interfacial engineering, and energy transfer mechanisms such as Förster resonance energy transfer (FRET). The lab also pioneers innovative fabrication techniques—such as microfluidic wet-spinning—for biocompatible materials, demonstrating applications in tissue engineering and cell encapsulation. Their work bridges materials chemistry, device physics, and nanofabrication to enable low-cost, high-performance optoelectronic systems.
Figures are computed from collected data and may differ slightly.
We present an investigation of polymer light-emitting diodes (PLEDs) with a solution-processable graphene oxide (GO) interlayer. The GO layer with a wide band gap blocks electron transport from an emissive polymer to an ITO anode while reducing the exciton quenching between the GO and the active layer in place of poly(styrenesulfonate)-doped poly(3,4-ethylenedioxythiophene) (PEDOT:PSS). This GO interlayer maximizes hole-electron recombinations within the emissive layer, finally enhancing device
The successful encapsulation of human hepatocellular carcinoma (HepG2) cells would greatly assist a broad range of applications in tissue engineering. Due to the harsh conditions during standard chitosan fiber fabrication processes, encapsulation of HepG2 cells in chitosan fibers has been challenging. Here, we describe the successful wet-spinning of chitosan-alginate fibers using a coaxial flow microfluidic chip. We determined the optimal mixing conditions for generating chitosan-alginate fibers
Metal halide perovskites are promising candidates for use in light emitting diodes (LEDs), due to their potential for color tunable and high luminescence efficiency. While recent advances in perovskite-based light emitting diodes have resulted in external quantum efficiencies exceeding 12.4% for the green emitters, and infrared emitters based on 3 D/2D mixed dimensional perovskites have exceeded 20%, the external quantum efficiencies of the red and blue emitters still lag behind. A critical issu
Although significant progress has been made in the development of green, red, and near-infrared perovskite light-emitting diodes (PeLEDs), blue PeLEDs exhibit inferior performance, owing to various defects and poor carrier injection in solution-processed perovskite films. Thus, this study incorporates dual-passivation additive diphenylphosphinamide (DPPA) into perovskite films, and through density functional theory calculations and experimental characterizations, DPPA has been proven to be an ef
This review provides a comprehensive understanding of the chemical structure and overall development trend for solution-processable NIR-absorbing ultra-narrow-bandgap (UNBG; below 1.5 eV) polymer donors used in organic solar cells.
Highly efficient inverted-type red-emitting hybrid polymeric light-emitting diodes (HyPLEDs) were successfully demonstrated via Förster resonance energy transfer (FRET) and interfacial engineering of metal oxide with a cationic conjugated polyelectrolyte (CPE). Similarly structured green- and red-emissive polyfluorene copolymers, F8BT and F8TBT, were homogeneously blended as a FRET donor (host) and acceptor (dopant). A cationic polyfluorene-based CPE was also used as an interfacial layer for opt
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