| Thin film deposition of Cu2O and application for solar cells K Akimoto, S Ishizuka, M Yanagita, Y Nawa, GK Paul, T Sakurai Solar energy 80 (6), 715-722, 2006 | 555 | 2006 |
| CIGS absorbers and processes S Niki, M Contreras, I Repins, M Powalla, K Kushiya, S Ishizuka, ... Progress in Photovoltaics: Research and Applications 18 (6), 453-466, 2010 | 513 | 2010 |
| Nitrogen doping into Cu2O thin films deposited by reactive radio-frequency magnetron sputtering S Ishizuka, S Kato, T Maruyama, K Akimoto Japanese Journal of Applied Physics 40 (4S), 2765, 2001 | 197 | 2001 |
| CIGS solar cell with MBE-grown ZnS buffer layer MM Islam, S Ishizuka, A Yamada, K Sakurai, S Niki, T Sakurai, K Akimoto Solar energy materials and solar cells 93 (6-7), 970-972, 2009 | 192 | 2009 |
| Na-induced variations in the structural, optical, and electrical properties of Cu (In, Ga) Se2 thin films S Ishizuka, A Yamada, MM Islam, H Shibata, P Fons, T Sakurai, K Akimoto, ... Journal of applied physics 106 (3), 2009 | 191 | 2009 |
| Thin-film deposition of Cu2O by reactive radio-frequency magnetron sputtering S Ishizuka, T Maruyama, K Akimoto Japanese Journal of Applied Physics 39 (8A), L786, 2000 | 172 | 2000 |
| Fabrication of wide-gap Cu (In1− xGax) Se2 thin film solar cells: a study on the correlation of cell performance with highly resistive i-ZnO layer thickness S Ishizuka, K Sakurai, A Yamada, K Matsubara, P Fons, K Iwata, ... Solar energy materials and solar cells 87 (1-4), 541-548, 2005 | 159 | 2005 |
| Group III Elemental Composition Dependence of RbF Postdeposition Treatment Effects on Cu(In,Ga)Se2 Thin Films and Solar Cells S Ishizuka, N Taguchi, J Nishinaga, Y Kamikawa, S Tanaka, H Shibata The Journal of Physical Chemistry C 122 (7), 3809-3817, 2018 | 106 | 2018 |
| Thickness study of Al: ZnO film for application as a window layer in Cu (In1− xGax) Se2 thin film solar cell MM Islam, S Ishizuka, A Yamada, K Matsubara, S Niki, T Sakurai, ... Applied Surface Science 257 (9), 4026-4030, 2011 | 98 | 2011 |
| Control of hole carrier density of polycrystalline thin films by Si doping S Ishizuka, S Kato, Y Okamoto, K Akimoto Applied physics letters 80 (6), 950-952, 2002 | 94 | 2002 |
| Glass sheet for cu-in-ga-se solar cells, and solar cells using same M Nishizawa, Y Kuroki, T Nagashima, Y Kawamoto, S Niki, S Ishizuka US Patent App. 13/449,895, 2012 | 85 | 2012 |
| Direct insights into RbInSe2 formation at Cu (In, Ga) Se2 thin film surface with RbF postdeposition treatment N Taguchi, S Tanaka, S Ishizuka Applied Physics Letters 113 (11), 2018 | 82 | 2018 |
| Alkali incorporation control in Cu (In, Ga) Se2 thin films using silicate thin layers and applications in enhancing flexible solar cell efficiency S Ishizuka, A Yamada, K Matsubara, P Fons, K Sakurai, S Niki Applied Physics Letters 93 (12), 2008 | 82 | 2008 |
| Polycrystalline n‐ZnO/p‐Cu2O heterojunctions grown by RF‐magnetron sputtering S Ishizuka, K Suzuki, Y Okamoto, M Yanagita, T Sakurai, K Akimoto, ... physica status solidi (c) 1 (4), 1067-1070, 2004 | 81 | 2004 |
| Development of high-efficiency flexible Cu (In, Ga) Se2 solar cells: a study of alkali doping effects on CIS, CIGS, and CGS using alkali-silicate glass thin layers S Ishizuka, A Yamada, K Matsubara, P Fons, K Sakurai, S Niki Current Applied Physics 10 (2), S154-S156, 2010 | 77 | 2010 |
| Improvement of ZnO TCO film growth for photovoltaic devices by reactive plasma deposition (RPD) K Iwata, T Sakemi, A Yamada, P Fons, K Awai, T Yamamoto, S Shirakata, ... Thin Solid Films 480, 199-203, 2005 | 77 | 2005 |
| Passivation of defects in polycrystalline Cu2O thin films by hydrogen or cyanide treatment S Ishizuka, S Kato, Y Okamoto, T Sakurai, K Akimoto, N Fujiwara, ... Applied surface science 216 (1-4), 94-97, 2003 | 76 | 2003 |
| Structural tuning of wide‐gap chalcopyrite CuGaSe2 thin films and highly efficient solar cells: differences from narrow‐gap Cu(In,Ga)Se2 S Ishizuka, A Yamada, PJ Fons, H Shibata, S Niki Progress in Photovoltaics: Research and Applications 22 (7), 821-829, 2014 | 74 | 2014 |
| Photoluminescence characterization of Zn1− xMgxO epitaxial thin films grown on ZnO by radical source molecular beam epitaxy H Shibata, H Tampo, K Matsubara, A Yamada, K Sakurai, S Ishizuka, ... Applied physics letters 90 (12), 2007 | 70 | 2007 |
| Effects of long-term heat-light soaking on Cu (In, Ga) Se2 solar cells with KF postdeposition treatment J Nishinaga, T Koida, S Ishizuka, Y Kamikawa, H Takahashi, M Iioka, ... Applied Physics Express 10 (9), 092301, 2017 | 63 | 2017 |
