The effect of isopropylamine-capped PbS quantum dots on infrared photodetectors and photovoltaics
In this paper, we explore the impact of isopropylamine (IPAM) as a short ligand on a solution-processed infrared photodetector and a photovoltaic device using lead sulfide (PbS) colloidal quantum dots. Original oleic acid capping is replaced by isopropylamine through a solution-phase ligand exchange process. Then a blend of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] or MEH-PPV and the isopropylamine-capped PbS colloidal quantum dots is prepared for a photosensitive layer sandwiched by two different electrodes. Results illustrate that contribution of isopropylamine can improve the responsivity of a photodetector and enhance the photovoltaic performance by increasing the open circuit voltage and short circuit current.
Publication Source (Journal or Book title)
Ghomian, T., Farimand, S., & Choi, J. (2017). The effect of isopropylamine-capped PbS quantum dots on infrared photodetectors and photovoltaics. Microelectronic Engineering, 183-184, 48-51. https://doi.org/10.1016/j.mee.2017.10.009