ZnO纳米树叶的可控生长及发光动力学  

Control Growth and Iuminescence-dynamics of Zinc Oxide Nanoleaves

作　　者：张春志[1] 高红[2] 胡建民[2] 李浩茹[1] 胡广洲[1] 

机构地区：[1]大庆石油学院华瑞学院 [2]哈尔滨师范大学

出　　处：《哈尔滨师范大学自然科学学报》2009年第5期81-84,共4页Natural Science Journal of Harbin Normal University

摘　　要：对用化学气象沉积法制备的ZnO纳米树叶进行了简单的控制生长及变温光致发光研究.实验表明,低温光致发光由中性施主束缚激子(D0,X)和导带自由电子向受主能级的跃迁(FA)组成.D0,X的强度随温度的升高迅速下降,发生热淬灭.最后热离化为自由激子(XA),成为占主导地位的峰.受主能级可能是N替代O形成的受主缺陷能级.受主能级可能是N替代O形成了No受主缺陷能级.We studied controlled growth and photoluminescences spectra as a function of measurement temperatures of the ZnO nanoleaves which were fabricated by chemical vapor deposition. The result of the experiment shows that low- temperature photoluminescences of nanoleaves are composed of neutral donor bound exciton（ Do ,X） and transition of a free electron in the conduction band to the acceptor level （FA）. The DO ,X emission peak insensity decreases quickly with the increase of temperature and finally disappears, which is due to the thermal ionization of bound excitons into free excitons （XA ）. In contrast, the Xn related peak gets relatively stronger with the increase of temperature and finally dominates the emission spectrum. The acceptor levels were proba- bly formed through N substituteing O.

关 键 词：纳米树叶 光致发光 激子 

分 类 号：TN304.21[电子电信—物理电子学] O471.1[理学—半导体物理]