Effect of diamine treatment on the conversion efficiency of PbSe colloidal quantum dot solar cells

✍ Scribed by Seiki Kitada; Einosuke Kikuchi; Akira Ohno; Shinji Aramaki; Shinya Maenosono

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 898 KB
• Volume: 149
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2009.07.002

✦ Synopsis

Polymer-free photovoltaic devices were fabricated via a solution process using PbSe colloidal quantum dots (QDs) and an organic semiconductor (tetrabenzoporphyrin, BP) that can be prepared in situ from a soluble precursor. The device structure was ITO/PEDOT/BP:QD/QD/Al, where the BP:QD and QD layers correspond to a bulk heterojunction and a buffer layer, respectively. The buffer layer was treated with ethylenediamine (EDA) to crosslink the QDs. As a result, the energy conversion efficiency of the EDAtreated device was superior to that of an untreated device, mainly due to an increase in the short-circuit current density.