Collective effects in charge transfer within a hybrid organic-inorganic system

TL;DR

This paper investigates collective electron transfer phenomena in a hybrid organic-inorganic system, revealing avalanche-like current noise and proposing a model to explain these correlated charge transfer effects.

Contribution

It uncovers collective effects in charge transfer through organic linkers in a hybrid system and introduces a model for the observed avalanche noise behavior.

Findings

Current noise exhibits avalanche character.

Critical exponents are consistent across measurements.

A plausible model explains the collective charge transfer.

Abstract

A collective electron transfer (ET) process was discovered by studying the current noise in a field effect transistor with light-sensitive gate formed by nanocrystals linked by organic molecules to its surface. Fluctuations in the ET through the organic linker are reflected in the fluctuations of the transistor conductivity. The current noise has an avalanche character. Critical exponents obtained from the noise power spectra, avalanche distributions, and the dependence of the average avalanche size on avalanche duration are consistent with each other. A plausible model is proposed for this phenomenon