jhon carlo cuya - Academia.edu (original) (raw)

Papers by jhon carlo cuya

Synthetic Metals, 2010

Cuprous oxide (Cu 2 O)-based solar cells with fullerene (C 60) were fabricated on indium tin oxid... more Cuprous oxide (Cu 2 O)-based solar cells with fullerene (C 60) were fabricated on indium tin oxide (ITO) by a spin-coating method. The microstructure and cell performance of the solar cells with the Cu 2 O:C 60 structure was investigated. A photovoltaic device based on an ITO/Cu 2 O:C 60 bulk heterojunction structure fabricated by the spin-coating method provided short-circuit current density of 0.11 mA cm −2 and opencircuit voltage of 0.17 V under an Air Mass 1.5 illumination. The microstructures of the Cu 2 O active layer were examined by using X-ray diffraction and transmission electron microscopy. The energy levels of the present solar cells are also discussed.

Thermochimica Acta, 2004

The sulfurization behavior of SrTiO 3 nanoparticles was studied by using a quartz spring-type the... more The sulfurization behavior of SrTiO 3 nanoparticles was studied by using a quartz spring-type thermobalance in CS 2 /N 2 atmosphere. The thermogravimetric curves showed the sulfurization of SrTiO 3 nanoparticles occurred at a temperature range from 150 to 750 • C accompanied with the maximum weight increase of 20.7%. A mixed sulfide as Sr 1.08 TiS 3 was formed during the sulfurization process, and it showed sulfur loss at higher temperatures forming Sr 1.08 TiS 3−x as a final product at 1000 • C. In contrast, SrTiO 3 powders with larger particles size showed sulfurization at temperatures ranging from 550 to 950 • C forming Sr 1.08 TiS 3 , and no sulfur loss was observed at higher temperatures. The difference found in the sulfurization behavior was assigned to not only the particle size but also the presence of OH groups in the SrTiO 3 nanoparticles. During the sulfurization of calcined SrTiO 3 nanoparticles, the removal of OH groups of SrTiO 3 was found to produce an increment of the starting temperature of sulfurization.

High Temperature Materials and Processes, 2003

Advances in Materials Science and Engineering, 2010

Copper system compound semiconductor solar cells were produced by a spin-coating method, and thei... more Copper system compound semiconductor solar cells were produced by a spin-coating method, and their cell performance and structures were investigated. Copper indium disulfide- (CIS-) based solar cells with titanium dioxide (TiO2) were produced on F-dopedSnO2(FTO). A device based on an FTO/CIS/TiO2structure provided better cell performance compared to that based on FTO/TiO2/CIS structure. Cupric oxide- (CuO-) and cuprous oxide- (Cu2O-) based solar cells with fullerene (C60) were also fabricated on FTO and indium tin oxide (ITO). The microstructure and cell performance of the CuO/C60heterojunction and theCu2O:C60bulk heterojunction structure were investigated. The photovoltaic devices based on FTO/CuO/C60and ITO/Cu2O:C60structures provided short-circuit current density of 0.015 mAcm−2and 0.11 mAcm−2, and open-circuit voltage of 0.045 V and 0.17 V under an Air Mass 1.5 illumination, respectively. The microstructures of the active layers were examined by X-ray diffraction and transmissio...

RSC Advances, 2014

Synthesis of novel self-designed Ni–Pd–Pt nanocubes that possess the potential for the preparatio... more Synthesis of novel self-designed Ni–Pd–Pt nanocubes that possess the potential for the preparation of designed catalysts of the future.

Thermochimica Acta, 2004

... Thermogravimetric study of the sulfurization of TiO2 nanoparticles using CS2 and the decompos... more ... Thermogravimetric study of the sulfurization of TiO2 nanoparticles using CS2 and the decomposition of their sulfurized product Jhon Cuyaa,∗ , Nobuaki Satoa, Katsutoshi Yamamotoa, Atsushi Muramatsua, Koyu Aokib, Yasunori Tagab ... Intensity /au (c) Dried ST01, 250 ˚ ...

春季大会講演集 I 資源編, Mar 28, 2005

Synthetic Metals, 2010

Cuprous oxide (Cu 2 O)-based solar cells with fullerene (C 60) were fabricated on indium tin oxid... more Cuprous oxide (Cu 2 O)-based solar cells with fullerene (C 60) were fabricated on indium tin oxide (ITO) by a spin-coating method. The microstructure and cell performance of the solar cells with the Cu 2 O:C 60 structure was investigated. A photovoltaic device based on an ITO/Cu 2 O:C 60 bulk heterojunction structure fabricated by the spin-coating method provided short-circuit current density of 0.11 mA cm −2 and opencircuit voltage of 0.17 V under an Air Mass 1.5 illumination. The microstructures of the Cu 2 O active layer were examined by using X-ray diffraction and transmission electron microscopy. The energy levels of the present solar cells are also discussed.

Thermochimica Acta, 2004

The sulfurization behavior of SrTiO 3 nanoparticles was studied by using a quartz spring-type the... more The sulfurization behavior of SrTiO 3 nanoparticles was studied by using a quartz spring-type thermobalance in CS 2 /N 2 atmosphere. The thermogravimetric curves showed the sulfurization of SrTiO 3 nanoparticles occurred at a temperature range from 150 to 750 • C accompanied with the maximum weight increase of 20.7%. A mixed sulfide as Sr 1.08 TiS 3 was formed during the sulfurization process, and it showed sulfur loss at higher temperatures forming Sr 1.08 TiS 3−x as a final product at 1000 • C. In contrast, SrTiO 3 powders with larger particles size showed sulfurization at temperatures ranging from 550 to 950 • C forming Sr 1.08 TiS 3 , and no sulfur loss was observed at higher temperatures. The difference found in the sulfurization behavior was assigned to not only the particle size but also the presence of OH groups in the SrTiO 3 nanoparticles. During the sulfurization of calcined SrTiO 3 nanoparticles, the removal of OH groups of SrTiO 3 was found to produce an increment of the starting temperature of sulfurization.

High Temperature Materials and Processes, 2003

Advances in Materials Science and Engineering, 2010

Copper system compound semiconductor solar cells were produced by a spin-coating method, and thei... more Copper system compound semiconductor solar cells were produced by a spin-coating method, and their cell performance and structures were investigated. Copper indium disulfide- (CIS-) based solar cells with titanium dioxide (TiO2) were produced on F-dopedSnO2(FTO). A device based on an FTO/CIS/TiO2structure provided better cell performance compared to that based on FTO/TiO2/CIS structure. Cupric oxide- (CuO-) and cuprous oxide- (Cu2O-) based solar cells with fullerene (C60) were also fabricated on FTO and indium tin oxide (ITO). The microstructure and cell performance of the CuO/C60heterojunction and theCu2O:C60bulk heterojunction structure were investigated. The photovoltaic devices based on FTO/CuO/C60and ITO/Cu2O:C60structures provided short-circuit current density of 0.015 mAcm−2and 0.11 mAcm−2, and open-circuit voltage of 0.045 V and 0.17 V under an Air Mass 1.5 illumination, respectively. The microstructures of the active layers were examined by X-ray diffraction and transmissio...

RSC Advances, 2014

Synthesis of novel self-designed Ni–Pd–Pt nanocubes that possess the potential for the preparatio... more Synthesis of novel self-designed Ni–Pd–Pt nanocubes that possess the potential for the preparation of designed catalysts of the future.

Thermochimica Acta, 2004

... Thermogravimetric study of the sulfurization of TiO2 nanoparticles using CS2 and the decompos... more ... Thermogravimetric study of the sulfurization of TiO2 nanoparticles using CS2 and the decomposition of their sulfurized product Jhon Cuyaa,∗ , Nobuaki Satoa, Katsutoshi Yamamotoa, Atsushi Muramatsua, Koyu Aokib, Yasunori Tagab ... Intensity /au (c) Dried ST01, 250 ˚ ...

春季大会講演集 I 資源編, Mar 28, 2005