2024

[62] Ahyeon Ma, Yongsoon Lee, Dongho Seo, Jiyoon Kim, Soohyeok Park, Jihoon Son, Woosuck Kwon, Dae-Hyun Nam, Hyosung Lee, Yong-Il Kim, Han-Don Um*, Hyeyoung Shin*, and Ki Min Nam*, "Unlocking the Potential of Bi2S3-Derived Bi Nanoplates: Enhanced Catalytic Activity and Selectivity in Electrochemical and Photoelectrochemical CO2 Reduction to Formate" Adv. Sci., 2400874 (2024)

[61] Xiangxiang Pan, Huidong Qian, Jiansheng Xu, Haifeng Wang, Han-Don Um, Chao Lin*, Xiaopeng Li*, Wei Luo*, "Stabilization of Active Ultrathin Amorphous Ruthenium Oxide via Constructing Electronically Interacted Heterostructure for Acidic Water Oxidation" Green Energy Environ., https://doi.org/10.1016/j.gee.2024.05.003 (2024)

[60] Yingnan Cao, Qing Xu, Yi Sun, Jixin Shi, Yi Xu, Yongfu Tang, Xiudong Chen, Shuai Yang, Zheng Jiang, Han-Don Um, Xiaopeng Li*, and Yong Wang*, "Steering lithium and potassium storage mechanism in covalent organic frameworks by incorporating transition metal single atoms" PNAS 121, e2315407121 (2024)

[59] Xiaotong Wu, Chao Lin, Weibo Hu, Chao Fu, Lei Tan, Haifeng Wang, Faiza Meharban, Xiangxiang Pan, Pan Fu, Han-Don Um, Qi Xiao, Xiaopeng Li*, Miho Yamauchi, and Wei Luo*, "Pluralistic Electronic Structure Modulation of Ruthenium Oxide for Enhanced Acidic Water Electrolysis" Small Structures, 2300518 (2024)

2023

[58] Xiaohang Zhu, Zongtao Zhao, Jialiu Tang, Xuan Peng, Han-Don Um, Xiaopeng Li, Qi Xiao*, Wei Luo*, "Elucidating the Roles of Oxygen Defects-rich TiOxNy Shell in Ti-based Electrocatalyst for Enhanced Oxygen Reduction Reaction" Fundamental Research,  https://doi.org/10.1016/j.fmre.2023.07.006 (2023)

[57] Namwoo Kim, Soohyeok Park , Hyein Cho, Jungtaek Lee, Myounghyun Lee, Han-Don Um*, Kwanyong Seo*, " Rational Approach for High-Efficiency Dopant-Free Solar Cells Characterized with Key Parameters" Solar RRL 7, 2300536 (2023)

N. Kim and S. Park are co-first authors.

[56] Sambhaji S. Shinde, Nayantara K. Wagh, Chi Ho Lee, Dong-Hyung Kim, Sung-Hae Kim, Han-Don Um, Sang Uck Lee*, and Jung-Ho Lee*, "Scaling-Up Insights for Zinc-Air Battery Technologies Realizing Reversible Zinc Anodes" Adv. Mater. 35, 2303509 (2023)

[55] Deokjae Choi, Jungtaek Lee, Munib Wober, Young-Ki Kim, Han-Don Um, Kwanyong Seo*, " Wavelength-selective photodetectors with high quantum efficiency using an optical blocking layer and a field-induced junction on a silicon nanowire" Device 1, 100018 (2023)

[54] Han-Don Um, Deokjae Choi , Amit Solanki , Emerald Huang , Kwanyong Seo, Fawwaz Habbal*, "Dynamic selection of visible wavelengths using resonant TiO2 nanostructures" Nanophotonics 12, 1995 (2023)

[53] Nayantara K. Wagh,   Dong-Hyung Kim,   Chi Ho Lee,   Sung-Hae Kim,   Han-Don Um,   Joseph Sang-Il Kwon,   Sambhaji S. Shinde,*   Sang Uck Lee, Jung-Ho Lee*, " Heterointerface promoted trifunctional electrocatalysts for all temperature high-performance rechargeable Zn-air batteries" Nanoscale Horiz. 8, 921 (2023)

2022

[52] Nayantara K. Wagh, Sambhaji S. Shinde, Chi Ho Lee, Sung-Hae Kim, Dong-Hyung Kim, Han-Don Um, Sang Uck Lee*, Jung-Ho Lee* “Supramolecular Polymer Intertwined Free-Standing Bifunctional Membrane Catalysts for All-Temperature Flexible Zn–Air Batteries” Nano-Micro Lett. 14, 190 (2022).


[51] Deokjae Choi, Inchan Hwang, Youri Lee, Myounghyun Lee, Han-Don Um*, Kwanyong Seo* “Wafer-Scale Radial Junction Solar Cells with 21.1% Efficiency Using c-Si Microwires” Adv. Funct. Mater. 2208377 (2022).

2021

[50] Namwoo Kim, Deokjae Choi, Hyungwoo Kim, Han-Don Um, Kwanyong Seo*, “Silicon Microwire Arrays with Nanoscale Spacing for Radial Junction c-Si Solar Cells with an Efficiency of 20.5%” ACS Nano15, 9, 14756–14765 (2021).

[49]  Han-Don Um, Inchan Hwang, Deokjae Choi, Kwanyong Seo, “Flexible Crystalline-Silicon Photovoltaics: Light Management with Surface Structures” Acc. Mater. Res. 2, 9, 701–713 (2021).

[48] Kangmin Lee, Han-Don Um, Deokjae Choi, Jeonghwan Park, Namwoo Kim, Hyungwo Kim, Kwanyong Seo, “The Development of Transparent Photovoltaics” Cell Rep. Phys. Sci. 1, 100143 (2020).

[47]  Han-Don Um, Kangmin Lee, Inchan Hwang, Jeonghwan Park, Deokjae Choi, Namwoo Kim, Hyungwoo Kim and Kwanyong Seo, “Progress in silicon microwire solar cells” J. Mater. Chem. A, 8, 5395-5420 (2020). 

[46] Kangmin Lee, Namwoo Kim, Kwangin Kim, Han-Don Um, Wonjoo Jin, Deokjae Choi, Jeonghwan Park, Kyung Jin Park, Seungwoo Lee and Kwanyong Seo, “Neutral-Colored Transparent Crystalline Silicon Photovoltaics” Joules, 4, 1-12 (2020).

[45] Han-Don Um, Amit Solanki, Ashwin Jayaraman, Roy G. Gordon and Fawwaz Habbal, “Electrostatically Doped Silicon Nanowire Arrays for Multispectral Photodetectors” ACS Nano, 13, 11717-11725 (2019).

[44] Deokjae Choi, Hyun Yoon, Ka-Hyun Kim, Han-Don Um and Kwanyong Seo, "ITO-Free Carrier-Selective Contact for Crystalline Silicon Solar Cells " J. Mater. Chem. A, 7, 2192 (2019). *Co-corresponding author.

[43] Hyun-Tak Kim, Kangmin Lee, Wonjoo Jin, Han-Don Um, Minsoo Lee, Eunhye Hwang, Tae-Hyuk Kwon and Kwanyong Seo, "Energy Downshifting for Diminishing Surface Recombination in Silicon Nanowire Solar Cells" Sci. Rep., 8, 16974 (2018).

[42] Inchan Hwang*, Han-Don Um*, Byeong-Su Kim, Munib Wober and Kwanyong Seo, "Flexible crystalline silicon radial junction photovoltaics with vertically aligned tapered microwires " Energy & Environ. Sci., 11, 641-647 (2018). *Equally contributed first authors.

[41] Jeonghwan Park, Kangmin Lee, Han‐Don Um, Ka‐Hyun Kim and Kwanyong Seo, "Direct Fabrication of Flexible Ni Micro-grid Transparent Conducting Electrodes via Electroplated Metal Transfer" Adv. Mater. Technol., 3, 1700213 (2018).

[40]  Han-Don Um, Deokjae Choi, Ahreum Choi, Ji Hoon Seo and Kwanyong Seo, "Embedded Metal Electrode for Organic–Inorganic Hybrid Nanowire Solar Cells" ACS Nano, 11, 6218 (2017).

[39] Ji Hoon Seo, Inchan Hwang, Han‐Don Um, Sojeong Lee, Kangmin Lee, Jeonghwan Park,  Hyeonoh Shin, Tae‐Hyuk Kwon, Seok Ju Kang and Kwanyong Seo, "Cold Isostatic-Pressured Silver Nanowire Electrodes for Flexible Organic Solar Cells via Room-Temperature Processes" Adv. Mater, 29, 1701479 (2017).

[38] Chihyun Hwang, Kangmin Lee, Han-Don Um, Yeongdae Lee, Kwanyong Seo and Hyun-Kon Song, " Conductive and Porous Silicon Nanowire Anodes for LIBs" J. Electrochem. Soc, 164, A1564-A1568 (2017).

[37] Han-Don Um*, Keun-Ho Choi*, Inchan Hwang, Se-Hee Kim, Kwanyong Seo and Sang-Young Lee, “Monolithically integrated, photo-rechargeable portable power sources based on miniaturized Si solar cells and printed solid-state lithium-ion batteries”, Energy Environ. Sci., 10, 931 (2017). (Front cover image, 2017). *Euqally contributed first authors.

[36] Hyun-Tak Kim, Ji Hoon Seo, Jeong Hyuk Ahn, Myung-Jin Baek, Han-Don Um, Sojeong Lee, Deok-Ho Roh, Jun-Ho Yum, Tae Joo Shin, Kwanyong Seo, and Tae-Hyuk Kwon, “Customized Energy Down-Shift Using Iridium Complexes for Enhanced Performance of Polymer Solar Cells”, ACS Energy Lett., 1, 991-999 (2016).

[35] Kangmin Lee, Inchan Hwang, Namwoo Kim, Deokjae Choi, Han-Don Um, Seungchul Kim and Kwanyong Seo, “17.6%-Efficient radial junction solar cells using silicon nano/micro hybrid structures”, Nanoscale, 8, 14473-14479 (2016).

[34] Namwoo Kim*, Han-Don Um*, Inwoo Choi, Ka-Hyun Kim and Kwanyong Seo, “18.4%-Efficient Heterojunction Si Solar Cells Using Optimized ITO/Top Electrode”, ACS Appl. Mater. Interfaces, 8, 11412-11417 (2016). *Equally contributed first authors.

[33] Han-Don Um, Namwoo Kim, Kangmin Lee, Inchan Hwang, Ji Hoon Seo and Kwanyong Seo, “Dopant-free All-back-contact Si Nanohole Solar Cells using MoOx and LiF films”, Nano Lett., 16, 981-987 (2016).

[32] Ji Hoon Seo*, Han-Don Um*, Atul Shukla, Inchan Hwang, Yong-Cheol Kang, Chang Su Kim, Myungkwan Song, and Kwanyong Seo, “Low-Temperature Solution-Processed Flexible Organic Solar Cells with PFN/AgNWs Cathode“, Nano Energy, 16, 122-129 (2015). *Equally contributed first authors.

[31] Han-Don Um, Inchan Hwang, Namwoo Kim, Young J. Yu, Munib Wober, Ka-Hyun Kim and Kwanyong Seo, “Micro-grid Electrode for Si Microwire Solar Cells with a Fill Factor of Over 80%”, Adv. Mater. Interfaces, 2, 1500347 (2015).

[30] Han-Don Um, Namwoo Kim, Kangmin Lee, Inchan Hwang, Ji Hoon Seo, Young J. Yu, Peter Duane, Munib Wober and Kwanyong Seo, “Versatile control of metal-assisted chemical etching for vertical silicon microwire arrays and their photovoltaic applications”, Sci. Rep., 5, 11277 (2015).

[29] Jae‐Won Song, Jin‐Young Jung, Han‐Don Um, Xiaopeng Li, Min‐Joon Park, Yoon‐Ho Nam, Sun‐Mi Shin, Tae Joo Park, Ralf B. Wehrspohn, and Jung‐Ho Lee, “Degradation Mechanism of Al2O3 Passivation in Nanostructured Si Solar Cells”, Adv. Mater. Interfaces, 1, 1400010 (2014).

[28] Han-Don Um, Kwang-Tae Park, Jin-Young Jung, Xiopeng Li, Keya Zhou, Sang-Won Jee, and Jung-Ho Lee, “Incorporation of a self-aligned selective emitter to realize highly efficient (12.8%) Si nanowire solar cells”, Nanoscale, 6, 5193-5199 (2014).

[27] Jin-Young Jung, Mi Jin Choi, Keya Zhou, Xiaopeng Li, Sang-Won Jee, Han-Don Um, Min-Joon Park, Kwang-Tae Park, Jin Ho Bang, and Jung-Ho Lee, “Photoelectrochemical water splitting employing a tapered silicon nanohole array”, J. Mater. Chem. A, 2, 833-842 (2014).

[26] Youngim Kwon, Changyol Yang, Sang-Hwa Yoon, Han-Don Um, Jung-Ho Lee, and Bongyoung Yoo, “Spalling of a Thin Si Layer by Electrodeposit-Assisted Stripping”, App. Phys. Express, 6, 116502 (2013).

[25] Kwang-Tae Park, Sun-Mi Shin, Abdullah S. Tazebay, Han-Don Um, Jin-Young Jung, Sang-Won Jee, Min-Wook Oh, Su-Dong Park, Bongyoung Yoo, Choongho Yu, and Jung-Ho Lee, “Lossless hybridization between photovoltaic and thermoelectric devices”, Sci. Rep, 3, 1-6 (2013).

[24] Sun-Mi Shin, Jin-Young Jung, Kwang-Tae Park, Han-Don Um, Sang-Won Jee, Yoon-Ho Nam, and Jung-Ho Lee, “A novel wrap-around metal contact optimized for radial p-n junction Si wire solar cells”, Energy Environ. Sci., 6, 1756-1760 (2013).

[23] Jin-Young Jung, Han-Don Um, Sang-Won Jee, Kwang-Tae Park, Jin Ho Bang, and Jung-Ho Lee, “Optimal design for antireflective Si nanowire solar cells”, Sol. Energy Mater. Sol. Cells, 112, 84-90 (2013).

[22]  Youbin Cao, Yanjun Xiao, Jin-Young Jung, Han-Don Um, Sang-Won Jee, Hye Mi Choi, Jin Ho Bang and Jung-Ho Lee, “Highly Electrocatalytic Cu2ZnSn(S1−xSex)4 Counter Electrodes for Quantum-Dot-Sensitized Solar Cells”, ACS Appl. Mater. Interfaces, 5, 479-484 (2013).

[21] Keya Zhou, Zhongyi Guo, Xiapeng Li, Jin-Young Jung, Sang-Won Jee, Kwang-Tae Park, Han-Don Um, Ning Wang, and Jung-Ho Lee, “The tradeoff between plasmonic enhancement and optical loss in silicon nanowire solar cells integrated in a metal back reflector”, Opt. Express, 20, A777-A787 (2012).

[20] Yoon-Ho Nam, Han-Don Um, Kwang-Tae Park, Sun-Mi Shin, Jong-Wook Baek, Min-Joon Park, Jin-Young Jung, Keya Zhou, Sang-Won Jee, Zhongyi Guo, and Jung-Ho Lee, “Multi-layer coating of SiO2 nanoparticles to enhance light absorption by Si solar cells”, J.  Korean Phys. Soc., 60, 1944-1948 (2012).

[19] Yanjun Xiao, Xiaopeng Li, Han-Don Um, Xuejiao Gao, Zhongyi Guo, and Jung-Ho Lee, “Controlled exfoliation of a heavily n-doped porous silicon double layer electrochemically etched for layer-transfer photovoltaics”, Electrochim. Acta, 74, 93-97 (2012).

[18] Syed Abdul Moiz, Ahmed Muhammad Nahhas, Han-Don Um, Sang-Won Jee, Hyung Koun Cho, Sang-Woo Kim, and Jung-Ho Lee, “A stamped PEDOT:PSS–silicon nanowire hybrid solar cell”, Nanotechnology, 23, 145401-145407 (2012).

[17] Han-Don Um, Sang-Won Jee, Kwang-Tae Park, Jin-Young Jung, Zhongyi Guo, and Jung-Ho Lee, “Epitaxial Insertion of Gold Silicide Nanodisks during the Growth of Silicon Nanowires”, J. of Nanosci. Nanotechnol., 11, 6118-6121 (2011).

[16] Jin-Young Jung, Keya Zhou, Han-Don Um, Zhongyi Guo, Sang-Won Jee, Kwang-Tae Park, and Jung-Ho Lee, “Effective method to extract optical bandgaps in Si nanowire arrays”, Opt. Letters, 36, 2677-2679 (2011).

[15] Xiaopeng Li, Zhongyi Guo, Yanjun Xiao, Han-Don Um, and Jung-Ho Lee, "Electrochemically etched pores and wires on smooth and textured GaAs surfaces", Electrochim. Acta, 56, 5071-5079 (2011).

[14] Han-Don Um, Syed Abdul Moiz, Kwang-Tae Park, Jin-Young Jung, Sang-Won Jee, Cheol Hyoun Ahn, Dong Chan Kim, Hyung Koun Cho, Dong-Wook Kim, and Jung-Ho Lee, “Highly selective spectral response with enhanced responsivity of n-ZnO/p-Si radial heterojunction nanowire photodiodes”, Appl. Phys. Lett., 98, 033102 (2011).

[13] Kwang-Tae Park, Zhongyi Guo, Han-Don Um, Jin-Young Jung, Jun Mo Yang, Sung Kyu Lim, Young Su Kim, and Jung-Ho Lee, “Optical properties of Si microwires combined with small nanoneedles for flexible thin film photovoltaics”, Opt. Express, 19, A41-A50 (2011).

[12] Jin-Young Jung, Zhongyi Guo, Sang-Won Jee, Han-Don Um, Kwang-Tae Park, Moon Seop Hyun, Jun Mo Yang, and Jung-Ho Lee, “A waferscale Si wire solar cell using radial and bulk p-n junctions”, Nanotechnology, 21, 445303 (2010).

[11] Han-Don Um, Kwang-Tae Park, Jin-Young Jung, Sang-Won Jee, Syed Abdul Moiz, Cheol Hyoun Ahn, Hyung Koun Cho, Eunsongyi Lee, Dong-Wook Kim, Yun Chang Park, Jun Mo Yang, Sung Kyu Lim, and Jung-Ho Lee, “Cost-efficient fabrication of UV/Vis nanowire(NW) photodiodes enabled by ZnO/Si radial heterojunction”, in proceeding of the IEEE International Electron Devices Meeting, pp. 222-225 (2010).

[10] Han-Don Um, Jin-Young Jung, Hong-Seok Seo, Kwang-Tae Park, Sang-Won Jee, Syed Abdul Moiz, and Jung-Ho Lee, “Silicon Nanowire Array Solar Cell Prepared by Metal-Induced Electroless Etching with a Novel processing Technology”, Jpn. J. Appl. Phys., 49, 04DN02-1 (2010).

[9]  Sang-Won Jee, Joondong Kim, Jin-Young Jung, Han-Don Um, Syed Abdul Moiz, Bongyoung Yoo, Hyung Koun Cho, Yun Chang Park, and Jung-Ho Lee, "Ni-catalyzed growth of silicon wire arrays for a Schottky diode", Appl. Phys. Lett., 97, 0421031-3 (2010).

[8] Syed Abdul Moiz, Sang-Won Jee, Han-Don Um, and Jung-Ho Lee, "Electrical Characterization of Metal-Silicon Microwire Interface Using Conductive Atomic Force Microscope", Jpn. J. Appl. Phys, 49, 045003-1~045003-6 (2010).

[7]  Xiaopeng Li, Han-Don Um, Jin-Young Jung, Hong-Seok Seo, and Jung-Ho Lee, "Triangular GaAs Microcones and Sharp Tips Prepared by Combining Electroless and Electrochemical Etching" J. Electrochem. Soc., 157, D1-D4 (2010).

[6] Jin-Young Jung, Zhongyi Guo, Sang-Won Jee, Han-Don Um, Kwang-Tae Park, and Jung-Ho Lee, “A strong antireflective solar cell prepared by tapering silicon nanowires”, Opt. Express, 18, A286-A292 (2010).

[5]  Han-Don Um, Jin-Young Jung, Xiaopeng Li, Sang-Won Jee, Kwang-Tae Park, Hong-Seok Seo, Syed Abdul Moiz, Sang-Wook Lee, Jong-Yeoul Ji, Chung Tae Kim, Moon Seop Hyun, Yun Chang Park, Jun Mo Yang, and Jung-Ho Lee, “A novel photovoltaic nanodevice based on the co-integration of silicon micro and nanowires prepared by electroless etching with conformal plasma doping”, in proceeding of the IEEE International Electron Devices Meeting, pp. 551-554 (2009).

[4]  Hong-Seok Seo, Xiaopeng Li, Han-Don Um, Bongyoung Yoo, Jae-Hyun Kim, Kang-Pil Kim, Yong Woo Cho, and Jung-Ho Lee, "Fabrication of precisely controlled silicon wire and cone arrays by electrochemical etching", Mater. Lett., 63, 2567-2569 (2009).

[3]  Hong-Seok Seo, Xiaopeng Li, Han-Don Um, Bongyoung Yoo, Yong Woo Cho, and Jung-Ho Lee, "Fabrication of Truncated Silicon Pyramid Arrays by Electrochemical Etching", Electrochem. Solid State Lett.,12, D89-D91(2009).

[2]  Xiaopeng Li, Hong-Seok Seo, Han-Don Um, Sang-Won Jee, YongWoo Cho, Bongyoung Yoo, Jung-Ho Lee, "A periodic array of silicon pillars fabricated by photoelectrochemical etching" Electrochim. Acta, 54, 6978-6982 (2009).

[1]  Kwang-Tae Park, Han-Don Um, Sang-Won Jee, Jin-Young Jung, Yun Chang Park, Jun Mo Yang, and Jung-Ho Lee, “Freestanding Ge/SiO2 Core/Shell Nanoparticles Formed via Metastable SiO2 Hollow Nanospheres on a Si Wafer”, Chem. Vapor Depos., 14, 331-333 (2008).