A p-type PbS quantum dot ink with improved stability for solution processable optoelectronics

Chem Commun (Camb). 2021 Jul 25. doi: 10.1039/d1cc03014k. Online ahead of print.ABSTRACTA highly stable p-type PbS-QDs ink is prepared using a single-step biphasic ligand exchange route, overcoming instability encountered in previous reports. Chemical characterization of the ink reveals 3-mercaptopriopionic acid (MPA) capped QDs stable in benzylamine solvent over a period of weeks or longer. The film resistivity, 1.45 kΩ cm, is an order magnitude lower and surface roughness, ∼ 0.5 nm, is superior vs. PbS films reported so far, and proof of concept photovoltaic devices showed efficiency > 5.5%.PMID:34304259 | DOI:10.1039/d1cc03014k

Source: Chemical Communications - July 25, 2021 Category: Chemistry Authors: Fiaz Ahmed John H Dunlap Perry J Pellechia Andrew B Greytak Source Type: research