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pro vyhledávání: '"Rajan Jose"'
Publikováno v:
Applied Physics Letters. 89(1):13115-13117
White-light-emitting CdSe quantum dots (QDs) were synthesized at room temperature (RT, ∼23°C) using an organometallic colloidal growth process. These QDs are characterized by high and reproducible quantum yields (ΦPL∼0.4) as well as by unusual
Publikováno v:
Applied Physics Letters. 105:153901
Zirconium (Zr) is doped up to 5 at. % in anatase TiO2 nanowires by electrospinning and used as working electrode in dye-sensitized solar cells. Variations observed in the photovoltaic parameters were correlated by electrochemical impedance spectrosco
Publikováno v:
Applied Physics Letters. 104:053905
Dye-sensitized solar cell (DSC) modules are generally made by interconnecting large photoelectrode strips with optimized thickness (∼14 μm) and show lower current density (JSC ) compared with their single cells. We found out that the key to achiev
Publikováno v:
Applied Physics Letters. 98:152106
Charge transport through Nb-doped anatase TiO2 nanofibers (diameter ∼100 nm) developed by electrospinning is studied under the framework of hopping transport using electrochemical impedance spectroscopy measurements. It is observed that the Fermi l
Publikováno v:
Applied Physics Letters. 95:012101
In this study dye-sensitized solar cells (DSCs) were fabricated using electrospun TiO2 nanofibers. Electrochemical impedance spectroscopy and open-circuit voltage decay were used to analyze electron transport in electrospun nanofibers and determine t
Publikováno v:
Applied Physics Letters. 93:161901
It was observed that P2O5 generates TeO5+δ groups in tellurite glasses that have a profound influence on their optical properties. The presence of TeO5+δ groups in phosphotellurite glass made MoO3 behave in a different way compared to other telluri
Autor:
Seeram Ramakrishna, S. Uchida, Velmurugan Thavasi, Abhishek Kumar, Rajan Jose, Kazutoshi Fujihara
Publikováno v:
Applied Physics Letters. 93:023125
Through a combined experimental and theoretical investigation we have shown that the efficiency of charge injection in dye-sensitized solar cells constituted from dyes having a single carboxylic group is determined by the extent to which the lowest u
Autor:
Rajan Jose, Yasutake Ohishi
Publikováno v:
Applied Physics Letters. 90:211104
A quaternary glass system, TeO2–ZnO–Nb2O5–MoO3, with higher linear and nonlinear indices, third order optical susceptibility (χ3), and Raman gain coefficient and gain bandwidth is reported. The χ3 of these glasses are ∼80 times higher than
Publikováno v:
Applied Physics Letters. 90:131116
A transparent Tb3+ and Yb3+ codoped oxyfluoride glass ceramic containing CaF2 nanocrystals was developed. This glass ceramic showed an intense ultraviolet emission at 381nm due to the G65, D35→F67 transitions of Tb3+ ion when excited with a 974nm l
Autor:
Rajan Jose, Yasutake Ohishi
Publikováno v:
Applied Physics Letters. 89:121122
The Raman gain coefficient and bandwidth of tellurite glasses have been tailored by systematically adding WO3 and P2O5 in a TeO2–BaO–SrO–Nb2O5 glass system. The Raman gain coefficients of the resultant glasses were obtained from spontaneous Ram