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EFFECT OF SODIUM IN BRIDGMAN-GROWN CuInSe_2

机译：钠在布里奇曼生长的CuInSe_2中的作用

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Bridgman ingots were grown with melt compositions of CuInSe_2 (stoichiometric) and CuInSe_(2.2)(excess Se), plus 0 to 3 at. % additions of Na_2Se. The resulting ingots were basically p-type, with a decrease in solidcohesiveness with increased sodium addition. Within most of the containing quartz ampoules, a white powder wasdeposited, consisting mainly of silica and carbon, along with Na, In and Cu. A small amount of Cu_3Se_2 was alsodetected by XRD in grayish spots deposited within the ampoule. No Na was detected by XRD of a powdered sampleof an ingot with a 3 at. % Na_2Se addition. Observed also within the ampoule and on the ingot surface was a reddishfilm, yet to be analyzed but suspected to be copper. Measurements of thermoelectric power were made on wafers cutfrom the ingots, which indicated a two order of magnitude increase in hole concentration in the excess Se materialwith increase of Na_2Se addition but a smaller increase for the stoichiometrically prepared material.
机译：使用CuInSe_2（化学计量）和CuInSe_（2.2）的熔体成分来生长Bridgman锭 （多余的Se），加上0到3 at。 Na 2 Se的添加％。所得锭基本为p型，固体含量减少 内聚力增加钠的添加量。在大多数含有石英的安瓿瓶中，有白色粉末 沉积物，主要由二氧化硅和碳以及Na，In和Cu组成。也有少量的Cu_3Se_2 用X射线衍射（XRD）检测到安瓿内沉积的灰色点。 X射线粉末样品未检测到Na 3点的铸锭。 ％Na_2Se添加。在安瓿内和铸锭表面也观察到微红 胶片，尚未进行分析，但怀疑是铜。在切割的晶片上进行热电功率的测量 从铸锭中得出，这表明过量的硒材料中的空穴浓度增加了两个数量级 Na 2 Se添加量的增加，但是化学计量制备的材料的增加量较小。

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