Developments of newer oxysulfide semiconductors for magnetic and fluorescence materials
Developments of newer oxysulfide semiconductors for magnetic and fluorescence materials
批准号:
17540302
负责人:
MATSUSHITA Hiroaki
金额:
$1.66万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
2005
资助国家:
日本
项目状态:
已结题
起止时间:
2005 至 2006
中文摘要
(1)CuAlO_2等德拉磷矿型三元氧化物作为热电材料和透明半导体材料备受关注。CuLaO_2是蓝闪石中的一种,因此有望具有有价值的性质。研究了用固相反应法制备单相钙钛矿结构的CuLaO2。结果表明,在非化学计量比La(OH)3:Cu20=1:1.425的条件下,用La(OH)3在真空中烧成的CuLaO2粉末,虽然含有微量的金属铜,但几乎是单相的CuLaO2。所得CuLaO_2为p型半导体,其塞贝克系数为70μV/K。用La_2O_3在Ar中烧成化学计量比的混合粉末,得到单相CuLaO_2。掺锶或钙的样品的发射强度比未掺杂的CuLaO_2高一个数量级。[(2)层状硫氧化物LaCuOS为…更像是一种宽禁带p型半导体,与典型的宽禁带半导体相比,它具有优异的性能。我们尝试了不使用La_2S_3合成单相LaCuOS粉末的工艺方法,并报道了用La_2S_3和2CuO两种材料组合焙烧的方法。结果表明,在真空下600℃的低温下制备的样品为LaCuOS单相,禁带宽度约为3.1 eV。以La_2S_3、CuO和(In_2S_3或Y_2S_3)粉末为原料,采用固相反应法合成了单相掺In或Y掺杂LaCuOS。X-射线衍射和漫反射光谱结果表明,掺In和掺Y的LaCuOS固溶体的单相x=0.2。与未掺杂LaCuOS相比,In掺杂(x<;0.3)和Y掺杂(x<;0.15)LaCuOS具有更高的发光强度。较少
英文摘要
(1) Delafossite-type ternary oxides such as CuAlO_2 have received much attention as a material for thermoelectric application and transparent semiconductor. CuLaO_2 is one of delafossites and hence is expected to have valuable properties. The preparation of single-phase CuLaO_2 with delafossite-type structure by means of the solid-state reaction method was investigated. The results showed nearly single-phase CuLaO_2, although a trace amount of metallic copper was included, was obtained by using La(OH)_3, and firing the mixed powder with non-stoichiometric composition ratio of La(OH)_3 : Cu_20 =1 : 1.425 in a vacuum. The CuLaO_2 thus obtained was a p-type semiconductor and has the Seebeck coefficient of 70 μV/K. The single-phase CuLaO_2 was obtained by using La_20_3, and firing the mixed powder with stoichiometric composition ratio in Argon. The emission intensities of samples doped by Sr or Ca were higher of one order than that of non-doped CuLaO_2.[(2)The layered oxysulfide LaCuOS is … More a wide-gap p-type semiconductor that exhibits exceptional properties compared to representative wide-gap semiconductors. We have attempted the process method for synthesizing a single phase of LaCuOS powders not using La_2S_3, and reported by the calcinations from the combination of two materials, La_2S_3 and 2CuO. These results of the samples prepared at the lower temperature of 600℃ under a vacuum showed to have the single phase of LaCuOS with a band gap of about 3.1eV. We have developed for synthesizing a single phase of In-or Y-doped LaCuOS by solid phase reaction method using La_2S_3, CuO and (In_2S_3 or Y_2S_3) powders. The results of X-ray diffraction and diffuse reflective spectroscopy of La_<1-x>In_xCuOS and La_<1-x>Y_xCuOS samples prepared from the combinations showed that the single phase of In-and Y-doped LaCuOS solid solutions below about x = 0.2. These photoluminescence spectra of In-doped (x < 0.3) and Y-doped (x < 0.15) LaCuOS showed to have higher emission intensities than that of non-doped LaCuOS. Less
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DOI:
10.1007/s10853-005-1223-5
发表时间:
2005-04-01
期刊:
JOURNAL OF MATERIALS SCIENCE
影响因子:
4.5
作者:
[Matsushita, H, Ichikawa, T, Katsui, A]
通讯作者:
Katsui, A
Preparation and characterization of Cu_2ZnGeSe_4 thin films by selenization method using the Cu-Zn-Ge evaporated layer precursors
Cu-Zn-Ge蒸镀层前驱体硒化法制备Cu_2ZnGeSe_4薄膜及表征
DOI:
--
发表时间:
2005
期刊:
Journal of Crystal Growth 275
影响因子:
--
作者:
[H.Matsushita, T.Ochiai, A.Katsui]
通讯作者:
A.Katsui
Thermoelectric properties of Zn1-xMxSb2O6 (M=Al, In)
Zn1-xMxSb2O6 (M=Al, In)的热电性能
DOI:
--
发表时间:
2006
期刊:
Phys. Stat. Sol. (a) 203(11)
影响因子:
--
作者:
[A.Katsui, H.Matsushita]
通讯作者:
H.Matsushita
Preparation of CuInGeSe_4 thin films by selenization method using the Cu-In-Ge evaporated layer precursors
Cu-In-Ge蒸镀层前驱体硒化法制备CuInGeSe_4薄膜
DOI:
--
发表时间:
2005
期刊:
Journal of Physics and Chemistry of Solids 66
影响因子:
--
作者:
[H.Matsushita, T.Ochiai, K.Mikajiri, A.Katsui]
通讯作者:
A.Katsui
Phase diagram and characterization of Mn-doped ZnSnAs2 crystals
Mn掺杂ZnSnAs2晶体的相图和表征
DOI:
--
发表时间:
2006
期刊:
Phys. Stat. Sol. (c) 3(8)
影响因子:
--
作者:
[H.Matsushita, M.Watanabe, A.Katsui]
通讯作者:
A.Katsui
共 12 条
Development of Traffic Simulator for Estimating the Risk of the Traffic Accidents
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批准号:17510141
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项目类别:Grant-in-Aid for Scientific Research (C)
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资助金额:$1.31万
-
财政年份:2005
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负责人:MATSUSHITA Hiroaki
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依托单位:
海外基金