Investigation of PbS nanocrystals sensitized extremely thin absorber (ETA) solar cell
Investigation of PbS nanocrystals sensitized extremely thin absorber (ETA) solar cell
复制标题
DOI：
10.1016/j.mssp.2015.03.004
复制
发表时间：
2015-08
影响因子：
4.1
通讯作者：
Javeed Akhtar;M. Sher;Malik Dilshad;Waqas Khalid;N. Revaprasadu;M. A. Malik
中科院分区：
文献类型：
--
作者：
Javeed Akhtar;M. Sher;Malik Dilshad;Waqas Khalid;N. Revaprasadu;M. A. Malik
采用环境友好的方法制备了胶体PbS纳米晶。采用粉末X射线衍射和高分辨透射电子显微镜对所制备的胶体PbS纳米晶进行了表征。由第一激子吸收峰（2.5 nm±0.2（J1）、2.8 nm±0.15（J2）和3.1 nm±0.3（J3））的位置确定的基态激子跃迁能量分别为1.71、1.35和1.15 eV。这些PbS纳米晶体，然后用于敏化纳米结构的ZnO-SnO 2电极，通过使用In 2S 3作为缓冲层。结果表明，电极对PbS纳米粒子的敏化过程对电荷的分离和传输起着重要的作用。由PbS NCs制造的电池，其中连接分子在电极表面上交换，与预配体修饰的PbS NCs相比，显示出相当高的入射光子转换效率（IPCE）。这里提出的研究结果可以潜在地应用于商业应用的低成本ETA设备的设计。
Colloidal PbS nanocrystals (NCs) were prepared by an environmental friendly route. The as-prepared colloidal PbS nanocrystals were characterized by powdered X-ray diffraction and high-resolution transmission electron microscopy (HR-TEM). The ground state excitonic transition energies determined from the position of the first excitonic absorption peaks (2.5 nm±0.2 (J1), 2.8 nm±0.15 (J2) and 3.1 nm±0.3 (J3) were 1.71, 1.35 and 1.15 eV respectively). These PbS nanocrystals were then used to sensitize a nanostructured ZnO–SnO2electrode by using In2S3as a buffer layer. The results showed that sensitization procedure of PbS NCs with electrode played a significant role in the charge separation and transport. The cell fabricated by PbS NCs in which linker molecules were exchanged on the surface of electrode showed considerably higher incident to photon conversion efficiency (IPCE) compared to pre-ligand modified PbS NCs. The findings presented here can potentially be applied for the design of low-cost ETA devices for commercial applications.