Sang-Hyeok Yang
Sang-Hyeok Yang
Postdoctoral Researcher

About Me

One-of-a-kind of SKKU-STEM group advised by Prof. Young-Min Kim at Sungkyunkwan university(SKKU)

email : 0412ysh@skku.edu


Research Interests / Analysis Techniques

  • Scanning Transmission Electron Microscopy (STEM)
    • STEM imaging
    • STEM-EDX / EELS
    • 4D-STEM
  • Microscopy Data Analysis
    • Quantitative STEM analysis
    • STEM image filtering / post-processing
    • Spectroscopy analysis
    • STEM simulation
  • Deep Learning & Machine Learning for STEM Data
    • Signal enhancement of STEM data
    • Automation of quantitative STEM analysis
    • Manifold analysis of 4D-STEM / spectroscopy data

Education

  • Sungkyunkwan University (SKKU), Mar. 2019 ~ Feb. 2025
    • Ph.D. in Energy Science
  • Sungkyunkwan University (SKKU), Mar. 2013 ~ Feb. 2019
    • B.S. in Mechanical Engineering

Award

  • Best Presentation Award
    • 2024 Korea Society of Microscopy Spring
  • Encouragement Award
    • 2022 The 8th BK DOES Thesis Competition
  • Best Poster Award
    • 2022 Materials Research Society (MRS) Spring Meeting
  • Bronze Prize
    • 2021 Samsung Humantech Paper Award
  • Encouragement Award
    • 2021 The 7th BK DOES Thesis Competition
  • Best Presentation Award
    • 2021 Korea Society of Microscopy Spring

Publication

Main Paper

  • Sparse section imaging-based deep learning electron tomography of porous carbon supports in proton exchange membrane fuel cells
    • Sang-Hyeok Yang†, Yerin Jeon†, Min-Hyoung Jung†, Sung Yong Cho†, Eun-Byeol Park, Daehee Yang, Hyo June Lee, Yun Sik Kang, Chang Hyun Lee, Sung-Dae Yim*, Hu Young Jeong*, Sungchul Lee*, Young-Min Kim*
    • Journal of Energy Chemistry 2025 [Paper] [code]
  • Is chemical vapor deposition of monolayer WSe2 comparable to other synthesis routes?
    • Soo Ho Choi†, Sang-Hyeok Yang†, Sehwan Park†, Byeong Wook Cho, Tuan Dung Nguyen, Jung Ho Kim, Young-Min Kim*, Ki Kang Kim*, Young Hee Lee*
    • APL Materials 2023 [Paper] [code]
  • Deep learning morphological distribution analysis of metal alloy catalysts in proton exchange membrane fuel cells
    • Sang-Hyeok Yang†, Eun-Byeol Park†, Sung Yong Cho†, Yun Sik Kang, Hyeon-Ah Ju, Yerin Jeon, Daehee Yang, Sung-Dae Yim*, Sungchul Lee*, Young-Min Kim*
    • Materials Today Energy 2023 [Paper] [code]
  • 1T’ RexMo1-xS2–2H MoS2 lateral heterojunction for enhanced hydrogen evolution reaction performance
    • Huong Thi Thanh Nguyen†, Laud Anim Adofo†, Sang-Hyeok Yang†, Hyung-Jin Kim, Soo Ho Choi, Balakrishnan Kirubasankar, Byeong Wook Cho, Andrew Ben-Smith, Joohoon Kang, Young-Min Kim*, Soo Min Kim*, Young-Kyu Han*, Ki Kang Kim*
    • Advanced Functional Materials 2023 [Paper]
  • Hybrid deep learning crystallographic mapping of polymorphic phases in polycrystalline Hf0.5Zr0.5O2 thin films
    • Young-Hoon Kim†, Sang-Hyeok Yang†, Myoungho Jeong†, Min-Hyoung Jung, Daehee Yang, Hyangsook Lee, Taehwan Moon, Jinseong Heo, Hu Young Jeong, Eunha Lee*, Young-Min Kim*
    • Small 2022 [Paper]
  • Deep learning-assisted quantification of atomic dopants and defects in 2D materials
    • Sang-Hyeok Yang, Wooseon Choi, Byeong Wook Cho, Frederick Osei-Tutu Agyapong-Fordjour, Sehwan Park, Seok Joon Yun, Hyung-Jin Kim, Young-Kyu Han, Young Hee Lee, Ki Kang Kim, Young-Min Kim*
    • Advanced Science 2021 [Paper] [code]

Contributed Paper

  • An impermeable copper surface monolayer with high-temperature oxidation resistance
    • Su Jae Kim, Young-Hoon Kim, Bipin Lamichhane, Binod Regmi, Yousil Lee, Sang-Hyeok Yang, Seon Je Kim, Min-Hyoung Jung, Jae Hyuck Jang, Hu Young Jeong, Miaofang Chi, Maeng-Je Seong, Hak Soo Choi, Seong-Gon Kim*, Young-Min Kim*, Se-Young Jeong*
    • Nature Communications 2025 [Paper]
  • Interfacial contact-driven enhanced environmental photocatalysis of CdS-loaded OH-functionalized carbon nanotubes with low biotoxicity
    • Hyeon-Ah Ju, Dung Thanh Hoang, Woo-Sung Jang, Young-Hoon Kim, Eun-Byeol Park, Sang-Hyeok Yang, Kyuwook Ihm, Young-Min Kim*, Hangil Lee*
    • Applied Surface Science 2025 [Paper]
  • Multiphase cooperation for multilevel strain accommodation in a single-crystalline BiFeO3 thin film
    • Wooseon Choi, Bumsu Park, Jaejin Hwang, Gyeongtak Han, Sang-Hyeok Yang, Hyeon Jun Lee, Sung Su Lee, Ji Young Jo, Albina Y. Borisevich, Hu Young Jeong, Sang Ho Oh*, Jaekwang Lee*, Young-Min Kim*
    • Chinese Physics B 2024 [Paper]
  • Uneven strain relaxation in formamidinium lead triiodide (FAPbI3) films upon aging
    • Sooeun Shin, Sang-Hyeok Yang, Seongrok Seo, Hyoungmin Park, Urasawadee Amornkitbamrung, Yongjae In, Canjie Wang, Tomoya Nakamura, Atsushi Wakamiya, Young-Min Kim*, Hyunjung Shin*
    • ACS Energy Letters 2024 [Paper]
  • Polymorphic Kondo Effects Driven by Spin Lattice Coupling in VTe2
    • Dongyeun Won, Do Hoon Kiem, Woohyun Cho, Sang-Hyeok Yang, Young-Hoon Kim, Young-Min Kim, Suyeon Cho*, Myung Joon Han*, Heejun Yang*
    • Advanced Functional Materials 2024 [Paper]
  • Enhanced selective photocatalytic oxidation of a bio-derived platform chemical with vacancy-induced core-shell anatase TiO2 nanoparticles
    • Woo-Sung Jang, Vy Ngoc Pham, Sang-Hyeok Yang, Jaeyoon Baik, Hangil Lee*, Young-Min Kim*
    • Applied Catalysis B-Environmental 2023 [Paper]
  • Segmented tomographic evaluation of structural degradation of carbon support in proton exchange membrane fuel cells
    • Jung A. Hong, Min-Hyoung Jung, Sung Yong Cho, Eun-Byeol Park, Daehee Yang, Young-Hoon Kim, Sang-Hyeok Yang, Woo-Sung Jang, Jae Hyuck Jang, Hyo June Lee, Sungchul Lee*, Hu Young Jeong*, Young-Min Kim*
    • Journal of Energy Chemistry 2022 [Paper]
  • Highly enhanced ferroelectricity in HfO2-based ferroelectric thin film by light ion bombardment
    • Seunghun Kang, Woo-Sung Jang, Anna N. Morozovska, Owoong Kwon, Yeongrok Jin, Young-Hoon Kim, Hagyoul Bae, Chenxi Wang, Sang-Hyeok Yang, Alex Belianinov, Steven Randolph, Eugene A. Eliseev, Liam Collins, Yeehyun Park, Sanghyun Jo, Min-Hyoung Jung, Kyoung-June Go, Hae Won Cho, Si-Young Choi, Jae Hyuck Jang, Sunkook Kim, Hu Young Jeong, Jaekwang Lee, Olga S. Ovchinnikova, Jinseong Heo*, Sergei V. Kalinin*, Young-Min Kim*, Yunseok Kim*
    • Science 2022 [Paper]
  • Site-selective doping mechanisms for the enhanced photocatalytic activity of tin oxide nanoparticles
    • Woo-Sung Jang, Yeongrok Jin, Young-Hoon Kim, Sang-Hyeok Yang, Seon Je Kim, Jung A. Hong, Jaeyoon Baik, Jaekwang Lee*, Hangil Lee*, Young-Min Kim*
    • Applied Catalysis B-Environmental 2022 [Paper]
  • Escalating ferromagnetic order via Se-vacancy near vanadium in WSe2 monolayer
    • Seok Joon Yun, Byeong Wook Cho, Thapa Dinesh, Dae Hee Yang, Yong In Kim, Jeong Won Jin, Sang-Hyeok Yang, Tuan Dung Nguyen, Young-Min Kim, Ki Kang Kim, Dinh Loc Duong*, Seong-Gon Kim*, Young Hee Lee*
    • Advanced Materials 2022 [Paper]
  • Regulating Te vacancies through dopant balancing via excess Ag enables rebounding power factor and high thermoelectric performance in p-type PbTe
    • Hanhwi Jang, Jong Ho Park, Ho Seong Lee, Byungki Ryu, Su-Dong Park, Hyeon-Ah Ju, Sang-Hyeok Yang, Young-Min Kim, Woo Hyun Nam, Heng Wang, James Male, G. Jeffrey Snyder, Minjoon Kim, Yeon Sik Jung*, Min-Wook Oh*
    • Advanced Science 2021 [Paper]
  • Atomic-scale chemical mapping of copper dopants in Bi2Te2.7Se0.3 thermoelectric alloy
    • Young-Min Kim*, Kyu Hyoung Lee, Liangwei Fu, Min-Wook Oh, Sang-Hyeok Yang, Shoucong Ning, Gyeongtak Han, Min Young Kim, Ji-Soo Kim, Myoungho Jeong, Jaeduck Jang, Eunha Lee, Okunishi Eiji, Sawada Hidetaka, Sang-il Kim, Stephen J. Pennycook, Young Hee Lee, Sung Wng Kim*
    • Materials Today Physics 2021 [Paper]
  • Atomic-scale identification of invisible cation vacancies at an oxide homointerface
    • Yong In Kim, Myoungho Jeong, Jinho Byun, Sang-Hyeok Yang, Wooseon Choi, Woo-Sung Jang, Jaedeok Jang, Kiyoung Lee, Yongsung Kim, Jaekwang Lee*, Eunha Lee*, Young-Min Kim*
    • Materials Today Physics 2021 [Paper]

Presentation

Oral

  • Simultaneous mapping of elemental distribution and ionic displacement in multiferroic BiFeO3 thin film via a picoscale-precision STEM-EDX
    • 2022 Korean Society of Microscopy Spring
  • Deep learning-assisted quantification of atomic dopants and defects in 2D materials
    • The 2021 Fall Meeting of The Korean Ceramic Society
  • Deep Learning Assisted Quantification of Atomic Defects in 2D Materials
    • The 7th DOES Thesis Competition
  • Deep learning-assisted quantification of atomic dopants and defects in two-dimensional materials
    • 2021 Korean Society of Microscopy Spring
  • Deep learning assisted quantification of atomic defects in two-dimensional TMD materials
    • Electronic Materials and Applications 2021 (EMA2021)
  • Deep Learning Assisted Quantification of Atomic Defects in Two-Dimensional TMD Materials
    • 6th International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE2020)

Poster

  • Deep learning-based evaluation of the morphological distribution of Pt-based electrocatalysts in proton exchange membrane fuel cells
    • The 20th International Microscopy Congress (IMC20)
  • Deep learning-assisted quantification of atomic defects in 2D materials
    • Nano Korea 2022 Symposium
  • Deep learning-assisted quantification of atomic defects in 2D materials
    • The 22nd International Conference on the Science and Applications of Nanotubes and Low-Dimensional Materials (NT22)
  • Simultaneous mapping of elemental distribution and ionic displacement in multiferroic BiFeO3 thin film via a picoscale-precision STEM-EDX
    • 2022 Materials Research Society (MRS) Spring Meeting & Exhibit
  • Simultaneous mapping of elemental distribution and ionic displacement in multiferroic BiFeO3 thin film via a picoscale-precision STEM-EDX
    • 2022 The 17th Dielectric Material Symposium