Publication

68. Progress in Silicon Microwire Solar Cells (Invited Review)

H. -D. Um, K. Lee, I. Hwang, J. Park, D. Choi, N. Kim, H. Kim, K. Seo* "Progress in Silicon Microwire Solar Cells" J. Mater. Chem. A 2020, 8, 5395-5420

67. Neutral-Colored Transparent Crystalline Silicon Photovoltaics

K. Lee, N. Kim, K. Kim, H. -D. Um, W. Jin, D. Choi, J. Park, K. J. Park, S. Lee*, K. Seo* "Neutral-Colored Transparent Crystalline Silicon Photovoltaics" Joule 2020, 4, 235.

The Economist: Transparent solar cells could be used to glaze office blocks
C&E News (ACS): Researchers make transparent solar cells from hole-riddled silicon
Chemistry World (RSC): Tiny holes turn silicon solar cells transparent
New Scientist: Punching holes in solar cells turns them into transparent windows
PV Magazine: New transparent solar cell for window applications
Science Daily: Punching holes in opaque solar cells turns them transparent
EurekAlert (AAAS) : Punching holes in opaque solar cells turns them transparent

66. Solar rechargeable seawater battery

J. H. Kim, S. M. Hwang, I. Hwang, J. Han, J. H. Kim, Y. H. Jo, K. Seo, Y. Kim, J. S. Lee "Seawater-mediated solar-to-sodium conversion by bismuth vanadate photoanode - photovoltaic tandem cell: Solar rechargeable seawater battery" iScience 19, 232-243.

65. ITO-Free Carrier-Selective Contact Solar Cells

D. Choi, H. Yoon, K. -H. Kim*, H. -D. Um*, K. Seo* "ITO-Free Carrier-Selective Contact for Crystalline Silicon Solar Cells " J. Mater. Chem. A 2019, 7, 2192.

64.Energy Downshifting for Silicon Nanowire Solar Cells

H. -T. Kim, K. Lee, W. Jin, H. -D. Um, M. Lee, E. Hwang, T. -H. Kwon*, K. Seo* "Energy Downshifting for Diminishing Surface Recombination in Silicon Nanowire Solar Cells" Sci. Rep. 2018, 8, 16974.

63. Flow Battery & PV

D. -S. Shin, M. Park, J. Ryu, I. Hwang, J. K. Seo, K. Seo*, J. Cho*, and S. Y. Hong* "Nonaqueous arylated quinone catholytes for lithium–organic flow batteries" J. Mater. Chem. A 2018, 6, 14761-14768.

62. Transparent Heating Stickers

K. Lee, J. Park, H. Kim, H.-S. Park, H.-K. Song, K.-H. Kim*, and K. Seo* "High-Performance Electrothermal and Anticorrosive Transparent Heating Stickers" J. Mater. Chem. A 2018, 6, 11790-11796.

61. Nanowire Waveguide Resonances

K. B. Crozier, K. Seo, H. Park, A. Solanki, and S.-Q. Li "Controlling the light absorption in a photodetector via nanowire waveguide resonances for multispectral and color imaging" IEEE J. Sel. Top. Quantum Electron. 2018, 24, 380212.

60. Flexible Crystalline Si Solar Cells

I. Hwang, H. -D. Um, B. -S. Kim, M. Wober, and K. Seo* "Flexible crystalline silicon radial junction photovoltaics with vertically aligned tapered microwires " Energy & Environ. Sci. 2018, 11, 641-647.

59. Stretchable Battery

W. -J. Song, J. Park, D. H. Kim, S. Bae, M. -J. Kwak, M. Shin, S. Kim, S. Choi, J. -H. Jang, T. J. Shin, S. Y. Kim*, K. Seo*, and S. Park* "Jabuticaba-inspired Hybrid Carbon Filler/Polymer Electrode for Use in Highly Stretchable Aqueous Li-ion Batteries " Adv. Energy Mater. 2018, 8, 170248.

58.Flexible Transparent Electrode

J. Park, K. Lee, H. Um, K. -H. Kim*, and K. Seo* "Direct Fabrication of Flexible Ni Micro-grid Transparent Conducting Electrodes via Electroplated Metal Transfer" Adv. Mater. Technol. 2018, 3, 1700213 .

57. Uniform Si Epitaxy

J. -E. Hong, N. Kim, H. Yoon, Y. H. Jo, D. S. Kim, K. Seo*, and K. -H. Kim* "Growth Uniformity of Epitaxy Silicon Grown at 200 °C Using 60 MHz Very High Frequency Plasma Enhanced Vapor Phase Epitaxy" J. Nanosci. Nanotechnol. 2017, 17, 8534.

56. Textured PDMS Stickers for PVs

I. Hwang, D. Choi, S. Lee, J. H. Seo, K. -H. Kim*, I. Yoon*, and K. Seo* "Enhancement of Light Absorption in Photovoltaic Devices using Textured PDMS Stickers" ACS Appl. Mater. Interfaces 2017, 9, 21276.

55. Organic–Inorganic Hybrid Nanowire Solar Cells

H. -D. Um, D. Choi, A. Choi, J. H. Seo and K. Seo* "Embedded Metal Electrode for Organic–Inorganic Hybrid Nanowire Solar Cells" ACS Nano, 2017, 11, 6218.

54. Porous Silicon Nanowire Anodes for LIBs

C. Hwang, K. Lee, H. -D Um, Y. Lee, K. Seo* and H. -K. Song* " Conductive and Porous Silicon Nanowire Anodes for LIBs" J. Electrochem. Soc, 2017, 164 (7), A1564-A1568.

53. Transparent Conducting Electrodes

J. H. Seo, I. Hwang, H. -D. Um, S. Lee, K. Lee, J. Park, H. Shin, T. -H. Kwon, S. J. Kang*, and K. Seo* "Cold Isostatic-Pressured Silver Nanowire Electrodes for Flexible Organic Solar Cells via Room-Temperature Processes" Adv Mater, 2017, 1701479.

52. PV-Battery Hybrid Devices

H. -D. Um, K. -H. Choi, I. Hwang, S. -H. Kim, K. Seo* and S. -Y. Lee* "Monolithically integrated, photo-rechargeable portable power sources based on miniaturized Si solar cells and printed solid-state lithium-ion batteries" Energy & Environ. Sci., 2017, 10, 931.

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51. Energy Transfer Using Ir Complexes

H. Kim, J. H. Seo, J. H. Ahn, M. -J. Paik, H. -D. Um, S. Lee, D.-H. Roh, J. -H. Yum, T. J. Shin, K. Seo* and T. -H. Kwon* " Customized Energy Down-Shift Using Iridium Complexes for Enhanced Performance of Polymer Solar Cells" ACS Energy Lett, 2016, 1, 991-999.

50. Nano/micro Radial Junction Solar Cells

K. Lee, I. Hwang, N. Kim, D. Choi, H.-D. Um, S. Kim, and K. Seo* " 17.6%-efficient radial junction solar cells using silicon nano/micro hybrid structure" Nanoscale 2016, 8, 14473-14479.

49. c-Si/a-Si Heterojunction Si Solar Cells

N. Kim, H.-D. Um, I. Choi, K. -H. Kim*, and K. Seo* " 18.4%-Efficient Heterojunction Si Solar Cells Using Optimized ITO/Top Electrode" ACS Appl. Mater. Interfaces 2016, 8, 11412-11417.

48. Dopant-free Solar Cells

H.-D. Um, N. Kim, K. Lee. I. Hwang, J. H. Seo , and K. Seo* " Dopant-free All-back-contact Si Nanohole Solar Cells using MoO_x and LiF Films" Nano Lett. 2016, 16(2), pp 981-987.

47. Surface Plasmon Resonance

Y.-J. Kim, X. T. Geng, B. J. Chun, J. H. Seo, K. Seo, H. Yoon, D. E. Kim,Y. -J. Kim*, and S. Kim* "Frequency comb transferred by surface plasmon resonance" Nat. Commun. 2016, 7, 10685.

46. Micro-grid Electrode for Si MW Solar Cells

H.-D. Um, I. Hwang,N. Kim,Y. J. Yu, M. Wober,K.-H. Kim, and K. Seo* " Micro-grid Electrode for Si Microwire Solar Cells with a Fill Factor of Over 80%" Adv. Mater. Interfaces 2015, 2, 1500347.

45. Flexible Inverted Organic Solar Cells

J. H. Seo, H.-D. Um, A. Shukla, I. Hwang, J. Park, Y.-C. Kang, C. S. Kim, M. Song*, and K. Seo* "Low-Temperature Solution-Processed Flexible Organic Solar Cells with PFN/AgNWs Cathode" Nano Energy. 2015, 16, 122-129.

44. Wet Etching for Silicon Microwire Solar Cells

H.-D. Um, N. Kim, K. Lee, I. Hwang, J. H. Seo, Y. J. Yu, P. Duane, M. Wober, and K. Seo* "Versatile control of metal-assisted chemical etching for vertical silicon microwire arrays and their photovoltaic applications" Sci. Rep. 2015, 5, 11277.

43. High-performance Nanoporous Lithium-ion Battery Anode

G. Hwang, H. Park, T. Bok, S. Choi, S. Lee, I. Hwang, N. -S. Choi, K. Seo, and S. Park* "A high-performance nanoporous Si/Al₂O₃ foam lithium-ion battery anode fabricated by selective chemical etching of the Al–Si alloy and subsequent thermal oxidation" Chem. Comm. 2015, 51, 4429.

42. Silicon Nanowires Image Sensor

H. Park, Y. Dan, K. Seo, Y. J. Yu, P. K. Duane, H. Park, M. Wober, and K. B. Crozier* “Filter-Free Image Sensor Pixels Comprising Silicon Nanowires with Selective Color Absorption” Nano Lett. 2014, 14, 1804.

41.Nano-optics of Silicon Nanowires

K. B. Crozier, H. Park, K. Seo, P. Steinvurzel, E. Schonbrun, Y. Dan, T. Ellenbogen, P. K. Duane and M. Wober, "Harnessing the Nano-optics of Silicon Nanowires for Multispectral Imaging" IEEE Photonics Society News 2013, 27, 11-18.

40. Silicon Microwire Solar Cells

K. Seo, Y. J. Yu, P. K. Duane, W. Zhu, H. Park, M. Wober, and K. B. Crozier* “Si Microwire Solar Cells: Improved Efficiency with a Conformal SiO2 Layer” ACS Nano 2013, 7, 5539.

Selected Papers

Num	Title
39	S. Kim, H. Yoon, K. Seo, Y. Yoo, S. Lee, and B. Kim “Truncated Tetrahedron Seed Crystals Initiating Stereoaligned Growth of FeSi Nanowires” ACS Nano 2012, 6, 8652.
38	H. Park, K. Seo, and K. B. Crozier “Adding Colors to Polydimethylsiloxane by Embedding Vertical Silicon Nanowires” Appl. Phys. Lett. 2012, 101, 193107.
37	H. Yoon, Y. Yoo, K. Seo, J. In, and B. Kim “Synthesis and Applications of Noble Metal and Metal Silicide and Germanide 1-Dimensional Nanostructures” Bull. Korean Chem. Soc. 2012, 33, 2830.
36	T. Ellenbogen, K. Seo, and K. B. Crozier “Chromatic Plasmonic Polarizers for Active Visible Colour Filtering and Polarimetry” Nano Lett. 2012, 12, 1026.
35	S. Lee, J. In, J-W Chang, K. Seo, M-H Jung, J. Kim, and B. Kim “Magnetotransport Properties and Kondo Effect Observed in a Ferromagnetic Single-Crystalline Fe1-xCoxSi Nanowire” Chem. Asian J. 2012, 7, 406.
34	E. Schonbrun, K. Seo, and K. B. Crozier “Reconfigurable Imaging Systems Using Elliptical Nanowires” Nano Lett. 2011, 11, 4299.
33	Y. Dan., K. Seo, K. Takei, J. H. Meza, A. Javey, and K. B. Crozier “Dramatic reduction of surface recombination by in situ surface passivation of silicon nanowires” Nano Lett. 2011, 11, 2527.
32	K. Seo, M. Wober, P. Steinvurzel, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier “Multicolored Vertical Silicon Nanowires” Nano Lett. 2011, 11, 1851.
31	H. Yoon, T. Kang, J. M. Lee, S.-I. Kim, K. Seo, J. Kim, W. I. Park, and B. Kim, "Epitaxially Integrating Ferromagnetic Fe1.3Ge Nanowire Arrays on Few-Layer Graphene" J. Phys. Chem. Lett., 2011, 2, 956.
30	M. Jung, H. Noh, Y.-J. Doh, W. Song, Y. Chong, M.-S. Choi, Y. Yoo, K. Seo, N. Kim, B.-C. Woo, B. Kim, and J. Kim, "Superconducting junction of a single-crystalline Au nanowire for an ideal Josephson device" ACS Nano 2011, 5, 2271.
29	J. In, I. Yoon, K. Seo, J. Park, J. Choo, Y. Lee, and B. Kim, "Polymorph-tuned Synthesis of α-and β-Bi2O3 NWs and Determination of their Growth Direction from Polarized Raman Single NW Microscopy" Chem. Eur. J. 2011, 17, 1304.
28	H. Yoon, A. T. Lee, E. Choi, K. Seo, N. Bagkar, J. Cho, K. J. Chang, and B. Kim, "Structure-induced Ferromagnetic Stabilization in Freestanding Hexagonal Fe1.3Ge NWs" J. Am. Chem. Soc. 2010, 49, 17447.
27	J. In, Y. Yoo, J. Kim, K. Seo, H. Kim, H. Ihee, S. Oh, and B. Kim, "In-situ TEM Observation of Heterogeneous Phase Transition of a Constraine Single-crystalline Ag2Te NW" Nano Lett. 2010, 10, 4501.
26	K. Seo, N. Bagkar, S. Kim, J. In, H. Yoon, Y. Jo, and B. Kim, "Diffusion-driven Crystal Structure Transformation: Synthesis of Heusler alloy Fe3Si Nanowires" Nano Lett. 2010, 9, 3643.
25	K. Seo, H. Yoon, S.W. Ryu, S. Lee, Y. Jo, M. H. Jung, J. Kim, Y. K. Choi, and B. Kim, "Itinerant Helimagnetic Single-Crystalline MnSi NWs" ACS Nano 2010, 4, 2569.
24	N. Bagkar, K. Seo, H. Yoon, J. In, Y. Jo, and B. Kim, "Vertically Aligned Single-crystalline Ferromagnetic Ni3Co Nanowires" Chem. Mat. 2010, 22, 1831.
23	Y. Yoo, K. Seo, S. Han, K. S. K. Varadwaj, H. Kim, J. Ryu, H. Lee, J. Ahn, H. Ihee, and B. Kim, "Steering epitaxial alignment of Au, Pd, and AuPd nanowire arrays by atom flux change" Nano Lett. 2010, 10, 432.
22	H. Yoon, K. Seo, N. Bagkar, J. In, J. Park, J. Kim, and B. Kim, "Vertical Epitaxial Co5Ge7 Nanowire and Nanobelt Arrays on a Thin Graphitic Layer for Flexible Field Emission Display" Adv. Mater. 2009, 21, 4979.
21	J. In, K. Seo, S. Lee, H. Yoon, J. Park, G.H. Lee, and B. Kim, "Morphology-tuned Synthesis of Single-Crystalline V5Si3 Nanotubes and Nanowires" J. Phys. Chem. C 2009, 113, 12996.
20	K. Seo, S. Lee, H. Yoon, J. In, K. S. K. Varadwaj, Y. Jo, M.-H. Jung, J. Kim, and B. Kim, "Composition-Tuned ConSi Nanowires: Location-Selective Simultaneous Growth along Temperature Gradient" ACS Nano 2009, 3, 1145.
19	K. Seo, S. Lee, Y. Jo, M.-H. Jung, J. Kim, D. G. Churchill, and B. Kim, "Room Temperature Ferromagnetism in Single-Crystalline Fe5Si3 Nanowires" J. Phys. Chem. C 2009, 113, 6902.
18	T. Kang, I. Yoon, K. Jeon, W. Choi, Y. Lee, K. Seo, Y. Yoo, Q.-H. Park, H. Ihee, Y. Suh, and B. Kim, "Creating Well-defined Hot Spots for SERS by Single-crystalline Noble Metal NW Pairs" J. Phys. Chem. C 2009, 113, 7492.
17	S. Lee, W. Lee, K. Seo, J. Kim, S.-H. Han, and B. Kim, "Electronic Transport Mechanism and Photocurrent Generations of Single Crystalliine InN Nanowires" Nanotechnology 2008, 19, 415202.
16	H. Yoon, K. Seo, H. Moon, K. S. K. Varadwaj, J. In, and B. Kim, "Aluminum foil mediated non-catalytic growth of ZnO nanowire arrays on an ITO substrate" J. Phys. Chem. C 2008, 112, 9181.
15	J. In, K. S. K. Varadwaj, K. Seo, S. Lee, Y. Jo, M.-H. Jung, J. Kim, and B. Kim, "Single Crystalline Ferromagnetic Fe1-xCoxSi Nanowires" J. Phys. Chem. C 2008, 112, 4748.
14	P. Mohanty, I. Yoon, T. Kang, K. Seo, K. S. K. Varadwaj, W. Choi, Q. Park, J. Ahn, Y. Suh, H. Ihee, and B. Kim, "Simple Vapor Phase Synthesis of Single-crystalline Ag NWs and Single NW Surface-enhanced Raman Scattering" J. Am. Chem. Soc. 2007, 129, 9576.
13	K. Seo, K. S. K. Varadwaj, D. Cha, J. In, J. Kim, J. Park, and B. Kim, "Synthesis and electrical properties of single crystalline CrSi2 nanowires" J. Phys. Chem. C 2007, 111, 9072.
12	K. S. K. Varadwaj, K. Seo, J. In, P. Mohanty, J. Park, and B. Kim, "Phase Controlled Growth of Metastable Fe5Si3 Nanowires by a Vapor Transport Method" J. Am. Chem. Soc. 2007, 129, 8594.
11	K. Seo, K. S. K. Varadwaj, P. Mohanty, S. Lee, Y. Jo, M.-H. Jung, J. Kim, and B. Kim, "Magnetic Properties of Single Crystalline CoSi Nanowires" Nano Lett. 2007, 7, 1240.
10	I. Yoon, K. Seo, S. Lee, Y. Lee, and B. Kim, "Conformational study of tyramine and its water cluster by laser spectroscopy" J. Phys. Chem. A 2007, 111, 1800.
9	P. J. Pauzauskie, D. Talaga, K. Seo, P. Yang, and F. Lagugné-Labarthet “Polarized raman confocal microscopy of a single gallium nitride nanowire” J. Am. Chem. Soc. 2005, 127, 17146.
8	C. Yang, J. Park, K. An, S. Lim, K. Seo, B. Kim, K. Park, S. Han, C. Park, and Y. Lee, "Selective Removal of Metallic Single-Walled Carbon Nanotubes with Small Diameters by Using Nitric and Sulfuric Acids" J. Phys. Chem. B 2005, 109, 19242.
7	K. Seo, K. A. Park, C. Kim, S. Han, Y. H. Lee, and B. Kim, "Chirality- and Diameter-Dependent Reactivity of NO2 on Carbon Nanotube Walls" J. Am. Chem. Soc. 2005, 127, 15724.
6	S. Y. Kim, J. Lee, C. W. Na, J. Park, K. Seo, and B. Kim, "N-doped double-walled carbon nanotubes synthesized by chemical vapor deposition" Chem. Phys. Lett. 2005, 413, 300.
5	K. A. Park, K. Seo and Y. H. Lee “Adsorption of atomic hydrogen on singlewalled carbon nanotubes” J. Phys. Chem. B 2005, 109, 8967.
4	H. Choi, S. Bae, J. Park, K. Seo, C. Kim, B. Kim, H. Song, and H. Shin, "Experimental and theoretical studies on the structure of N-doped carbon nanotubes: Possibility of intercalated molecular N2" Appl. Phys. Lett. 2004, 85, 5742.
3	K. Seo, C. Kim, B. Kim, Y. H. Lee, and K. Song, "Growth Energetics of Single-Wall Carbon Nanotubes with Carbon Monoxide" J. Phys. Chem. B 2004, 108, 4308.
2	C. Kim, K. Seo, B. Kim, N. Park, Y. S. Choi, K. A. Park, and Y. H. Lee, "Tip-functionalized carbon nanotubes under electric fields" Phys. Rev. B 2003, 68, 115403.
1	K. Seo, C. Kim, Y. S. Choi, K. A. Park, Y. H. Lee, and B. Kim, "Tuning chirality of singlewalled carbon nanotubes by selective etching with carbon dioxide" J. Am. Chem. Soc. 2003, 125, 13496.

2020