Postdoctoral Researcher

DGIST

https://www.jslee.dgist.ac.kr/

https://energy.dgist.ac.kr/

Ph.D (Flexible and Printable Electronics ), Jeonbuk National University (JBNU), Korea 2019

Realizing full-color perovskite quantum dots light-emitting diodes via contemporary surface ligand/anion engineering
S He, HB Lee, N Kumar, KJ Ko, M Song, W Kim, JW Kang
Materials Today Chemistry 26, 101012(2022)

Blue Light Emitting Diodes based on Bright Quasi‐Type‐II ZnO@ 1‐Aminopyrene Hybrid Quantum Dots with a Long Operation Life
HH Kim, S Park, KJ Ko, SY Yim, JW Kang, WK Choi
Advanced Optical Materials 10 (18), 2200601(2022)

High-performance, large-area semitransparent and tandem perovskite solar cells featuring highly scalable a-ITO/Ag mesh 3D top electrodes
B Tyagi, HB Lee, N Kumar, WY Jin, KJ Ko, MM Ovhal, R Sahani, ...
Nano Energy 95, 106978(2022)

Trifluoromethyl‐Group Bearing, Hydrophobic Bulky Cations as Defect Passivators for Highly Efficient, Stable Perovskite Solar Cells
HB Lee, N Kumar, V Devaraj, B Tyagi, S He, R Sahani, KJ Ko, JW Oh, ...
Solar RRL 5 (12), 2100712(2021)

Tailoring the refractive index and surface defects of CsPbBr3 quantum dots via alkyl cation-engineering for efficient perovskite light-emitting diodes
S He, N Kumar, HB Lee, KJ Ko, YJ Jung, JI Kim, S Bae, JH Lee, JW Kang
Chemical Engineering Journal 425, 130678(2021)

Roll-to-roll 3D printing of flexible and transparent all-solid-state supercapacitors
MM Ovhal, N Kumar, HB Lee, B Tyagi, KJ Ko, S Boud, JW Kang
Cell Reports Physical Science 2 (9), 100562(2021)

Fabrication of an oxide/metal/oxide structured electrode integrated with antireflective film to enhance performance in flexible organic light-emitting diodes
KJ Ko, SR Shin, HB Lee, E Jeong, YJ Yoo, HM Kim, YM Song, J Yun, ...
Materials Today Energy 20, 100704(2021)

Dimensionality and defect engineering using fluoroaromatic cations for efficiency and stability enhancement in 3D/2D perovskite photovoltaics
HB Lee, N Kumar, B Tyagi, KJ Ko, JW Kang
Solar RRL 5 (3), 2000589(2021)

Flexible organic light emitting diodes based on bifunctional BaTiO3 nanoparticles embedded polymer substrate-light extractor
KJ Ko, HB Lee, M Jang, MH Lee, JW Kang
Molecular Crystals and Liquid Crystals 706 (1), 21-29(2020)

Flexible, wearable organic light‐emitting fibers based on PEDOT: PSS/Ag‐fiber embedded hybrid electrodes for large‐area textile lighting
KJ Ko, HB Lee, JW Kang
Advanced Materials Technologies 5 (6), 2000168(2020)

Realization of excitation wavelength independent blue emission of ZnO quantum dots with intrinsic defects
HH Kim, Y Lee, YJ Lee, J Jeong, Y Yi, C Park, SY Yim, B Angadi, KJ Ko, ...
ACS Photonics 7 (3), 723-734(2020)

Electrical, Optical, and Structural Characteristics of CH3NH3PbI3 Perovskite Light‐Emitting Diodes
M Oh, SI Jo, B Parida, A Singh, K Ko, JW Kang, H Kim
physica status solidi (a) 215 (20), 1701014(2018)

Two-step “seed-mediated” synthetic approach to colloidal indium phosphide quantum dots with high-purity photo-and electroluminescence
P Ramasamy, KJ Ko, JW Kang, JS Lee
Chemistry of Materials 30 (11), 3643-3647(2018)

High-performance, color-tunable fiber shaped organic light-emitting diodes
KJ Ko, HB Lee, HM Kim, GJ Lee, SR Shin, N Kumar, YM Song, JW Kang
Nanoscale 10 (34), 16184-16192(2018)

Improving light extraction of flexible OLEDs using a mechanically robust Ag mesh/ITO composite electrode and microlens array
SR Shin, HB Lee, WY Jin, KJ Ko, S Park, S Yoo, JW Kang
Journal of Materials Chemistry C 6 (20), 5444-5452(2018)

Ultra-smooth, fully solution-processed large-area transparent conducting electrodes for organic devices
WY Jin, RT Ginting, KJ Ko, JW Kang
Scientific Reports 6 (1), 1-10(2016)

Flexible, Stripe-Patterned Organic Solar Cells and Modules Based On Multilayer-Printed Ag Fibers for Smart Textile Applications
MM Ovhal, HB Lee, S Boud, KJ Ko, WY Jin, N Kumar, B Tyagi, JW Kang
Available at SSRN 4330032