[19p-E317-1~20] 9.2 Nanoparticles, Nanowires and Nanosheets

[19p-E317-17] Electronic Transport Properties of PbS Colloidal Quantum Dot Assembly Crosslinked by π-conjugated Molecular Ligands

〇Ibuki Watanabe¹, Liming Liu¹, Satria Z. Bisri², Ian Johnson³, Yasuhiro Ishida², Jeremy Burroughes³, Yoshihiro Iwasa^1,2 (1.Univ. Tokyo, 2.RIKEN-CEMS, 3.Cambridge Display Technology)

Keywords:colloidal quantum dot, conjugated molecule, FETs

In colloidal quantum dot (CQD) assemblies, the transport properties depend not only on the size of CQDs and the morphology of the assemblies but also on the choices of ligands that electronically couple the neighboring CQDs. Here, we show the selection and design of new crosslinking ligands chains of conjugated molecules to crosslink PbS QDs. By using these new ligands, we demonstrate high conductivity, despite the long inter-QD distance. The uses of these ligands are prospective for developing high performance photovoltaic and thermoelectric devices, where preservation of strong quantum confinement effect is beneficial.