对比了不同巯基稳定剂和前体浓度对水热环境CdTe量子点的生长过程和光物理性质的影响.结果表明,巯基丙酸与镉前体的结合能力较强,一定程度上减小了前体溶液中镉的浓度,故CdTe量子点生长速率较慢;空间位阻较大的硫普罗宁与镉前体的结合相对较弱,因此导致CdTe量子点生长较快.巯基丙酸有利于制备发光波长较短的高荧光强度CdTe量子点,而硫普罗宁有利于制备发光波长较长的高荧光强度CdTe量子点.前体浓度对CdTe量子点的生长速率和光物理性质的影响不明显.在上述实验结果基础上,考察了水溶性乙酸钠和聚丙烯酸钠电解质对水热环境中CdTe量子点的生长过程和光物理性质的影响.结果表明,添加乙酸钠后可提高CdTe量子点的生长速率,进而导致CdTe量子点的表面重构和钝化能力下降,使荧光强度降低;聚丙烯酸钠对镉单体独特的固定作用导致CdTe量子点生长缓慢,尺寸集中化受限,钝化能力降低,使荧光强度下降更加明显.
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