[9a-Z21-1~11] 【CS.8】 Code-sharing Session of 8.3 & 9.2 & 13.6

▲ [9a-Z21-9] Electron Transport in Iodide-Capped PbTe@PbS Core@Shell Nanocrystals

Retno Miranti¹, 〇Satria Zulkarnaen Bisri^1,2, Maria Ibanez^3,4, Maksym Kovalenko⁴, Nobuhiro Matsushita¹, Yoshihiro Iwasa^2,5 (1.Tokyo Inst. Tech., 2.RIKEN-CEMS, 3.IST Austria, 4.ETH Zurich, 5.Univ. Tokyo)

Keywords:colloidal quantum dots, core@shell nanocrystals, electron transport

The ability to control the charge carrier transport in the colloidal QDs assemblies is fundamental for the development of many electronic devices (e.g. solar cells, thermoelectrics, transistor, and photodetectors). Recently, we demonstrated exclusive electron transport in PbTe@PbS core@shell NCs that drastically suppressed contribution of holes to the overall transport distinct to the ambipolar characteristics demonstrated by many narrow bandgap NCs, while simultaneously electron dope the PbTe core. Nevertheless, n-type transport-instability has so far remained a challenge for narrow bandgap Pb-chalcogenide NCs, including this PbTe@PbS core@shell NCs. Here we show enhancement of electron transport and stability in the assemblies of the core@shell NCs using of iodide as the passivating ligand.