The effect of surface passivation on the structure of sulphur-rich PbS colloidal quantum dots for photovoltaic application

Nanoscale
Victor MalgrasJung Ho Kim

Abstract

The use of PbS colloidal quantum dots in photovoltaic devices is very promising because of their simple and low cost production processes and their unique properties, such as bandgap tunability and potential multiple exciton generation. Here we report the synthesis of PbS nanocrystals used for application in solar cells. The sulphur-rich nature of their surface appears to be caused by the exposure to ambient conditions. The use of methanol as medium during the ligand exchange process has a crucial role in the removal of native oleate ligands. Without proper ligand exchange, the unpassivated surface is subject to ambient hydroxylation leading to the depletion of Pb atoms and the formation of a polysulfide phase. Devices assembled with this material showed good performance with an efficiency of 3.2%.

References

May 12, 2005·Nano Letters·Randy J EllingsonAlexander L Efros
Sep 2, 2005·Nature·Xun WangYadong Li
Sep 29, 2009·ACS Nano·Iwan MoreelsZeger Hens
Apr 15, 2010·Journal of the American Chemical Society·Ratan DebnathEdward H Sargent
May 26, 2010·ACS Nano·Andras G Pattantyus-AbrahamEdward H Sargent
Jul 31, 2012·Nature Nanotechnology·Alexander H IpEdward H Sargent
Mar 19, 2013·Journal of the American Chemical Society·Hyekyoung ChoiSohee Jeong

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Citations

Jun 18, 2016·Physical Chemistry Chemical Physics : PCCP·Edwin A BaqueroFabien Delpech
Feb 28, 2017·Physical Chemistry Chemical Physics : PCCP·M TchaplyguineO Björneholm
Jun 2, 2017·Science and Technology of Advanced Materials·Victor MalgrasYusuke Yamauchi
Sep 12, 2018·Nanomaterials·Alberto MauluJuan P Martínez-Pastor
Aug 10, 2017·Nanomaterials·Rongfang WuLintao Hou
Jul 2, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Carlo Nazareno DibenedettoElisabetta Fanizza

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