Cooperative charging in a nanocrystal assembly gated by ionic liquid

Tianran Chen, Brian Skinner, B. I. Shklovskii

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In order to make a densely packed assembly of undoped semiconductor nanocrystals conductive, it is usually gated by a room-temperature ionic liquid. The ionic liquid enters the pores of the supercrystal assembly under the influence of an applied voltage. We study the capacitance of such a device as a function of the gate voltage. We show that, counterintuitively, the capacitance of the system is the sum of δ-functions located at a sequence of critical gate voltages. At each critical voltage, every nanocrystal acquires one additional electron.

Original languageEnglish (US)
Article number245304
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number24
DOIs
StatePublished - Dec 9 2011

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