Gaeun Cho

Reconstructing Quantum Dot Surfaces via Dual‐Functional Ligand Pairing Enables Efficient Shortwave Infrared Optoelectronics

Dong-Eon Kim, Minjung Yang, Yunjin Lee, Gaeun Cho et autres

ABSTRACT The growing demand for efficient infrared photon harvesting has spotlighted colloidal quantum dots (CQDs) as versatile, solution‐processable absorbers for emerging optoelectronics, including photovoltaics (PVs), thermophotovoltaics (TPVs), and photodetectors (PDs). However, achieving narrow size distribution and complete surface passivation remains particularly challenging …

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Steric Effect‐Controlled Atomic Passivation of Colloidal InAs Quantum Dots for Infrared Photodetectors

In-Suh Lee, Gaeun Cho, Yongnam Ahn, Minjung Yang et autres

ABSTRACT Infrared colloidal quantum dots (CQDs) are emerging as promising materials for next‐generation optoelectronics. Among these, III–V group CQDs have gained attention as lead‐free alternatives. However, achieving efficient surface passivation remains a key challenge for high‐performance lead‐free CQD infrared optoelectronics. Herein, we …

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Spatially Controlled Doping via High Diffusion Dynamics in Perovskite Nanocrystals for Efficient and Stable CO 2 Reduction Photocatalysis

Ha Som Oh, Byung Jun Yoo, Gaeun Cho, Jiyoon Yang et autres

A well-designed and precisely engineered electronic structure in heavily doped perovskite nanocrystals (PNCs) is critical for the development of high-performance photocatalysts. However, strategies to enhance doping density with various dopants are considerably limited due to lattice stress-induced structural instability. In this study, …

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High-performance wearable sensor for non-destructive, real-time detection of 6-PPD on living plants using Fe2O3 nanocube-carbon nanotube nanoribbon hybrid electrocatalyst

Shaktivel Manavalan, Gaeun Cho, Han Seul Kim, Sung Mi Jung

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Facile preparation of sulfur-rich carbon anodes from rubber scraps for lithium-ion batteries

H. Jin, Han Young Jung, Y.S. Lee, Gaeun Cho et autres

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Engineering Single‐Atom Catalysts on Conjugated Porphyrin Polymer Photocatalysts via E‐Waste for Sustainable Photocatalysis (Adv. Funct. Mater. 3/2025)

Bolormaa Bayarkhuu, Hyekyung Cho, Gaeun Cho, Jeeho Hong et autres

Sustainable Photocatalysis In article number 2411661, Han Seul Kim, Jeehye Byun, and co-workers present a sustainable approach to photocatalysis by upcycling electronic waste into single-atom catalysts supported on conjugated porphyrin polymers. The speciation and composition of the loaded metals precisely control the …

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Electrochemical reactivity of graphene under mechanical strain

Hyo Jin Lee, Jinhyun Hwang, Hyo Chan Hong, Young Wook Hwang et autres

Mechanical strain affects graphene's electrochemical reactivity towards 4-NBD, first decreasing then increasing at higher strains. This nonlinear behavior is explained by Marcus–Gerischer theory and strain-induced shifts in Dirac-point energy.

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Engineering Single‐Atom Catalysts on Conjugated Porphyrin Polymer Photocatalysts via E‐Waste for Sustainable Photocatalysis

Bolormaa Bayarkhuu, Hyekyung Cho, Gaeun Cho, Jeeho Hong et autres

Abstract This study presents a surface engineering strategy utilizing electronic waste (e‐waste) to incorporate single‐atom catalysts on conjugated polymers. Employing a conjugated porphyrin polymeric photocatalyst, gold single‐atom‐site catalysts are successfully introduced using the acidic metal leachates from e‐waste, where metal speciation and …

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Multi‐Facet Passivation of Ternary Colloidal Quantum Dot Enabled by Quadruple‐Ligand Ensemble toward Efficient Lead‐Free Optoelectronics (Adv. Energy Mater. 7/2024)

Dong-Eon Kim, Gaeun Cho, Yun Hoo Kim, Ji Hyun Kwon et autres

Optoelectronics In article number 2302579, Han Seul Kim, Se-Woong Baek, and co-workers proposed a multi-faceted passivation strategy for nontoxic ternary compound AgBiS2 colloidal quantum dots (CQDs). The quadruple-ligand ensemble enabled stableCQDink formation and reduced the trap density of theCQDsolids. Finally, high performance …

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Multi‐Facet Passivation of Ternary Colloidal Quantum Dot Enabled by Quadruple‐Ligand Ensemble toward Efficient Lead‐Free Optoelectronics

Dong-Eon Kim, Gaeun Cho, Yun Hoo Kim, Ji Hyun Kwon et autres

Abstract Solution‐processed ternary‐compound semiconductor AgBiS2 colloidal quantum dots (CQDs) are promising light‐absorbing materials owing to their nontoxicity and high absorption coefficient (>106 cm−1). However, rational strategies to passivate multi‐facet of ternary‐compound CQDs and manufacture stable CQD inks have not yet been proposed. …

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Growth of InAs Quantum Dots Using the Strained Superlattices and Their Optical Properties

Gaeun Cho, Choi H-K, Minhyon Jeon, J W Lee et autres