Validity of Transport Energy in Disordered Organic Semiconductors

TL;DR

This paper critically examines the concept of transport energy in disordered organic semiconductors, showing it is not a universally valid concept across various conditions such as temperature, electric field, and disorder levels.

Contribution

The study provides a comprehensive analysis demonstrating that transport energy is not a valid or general concept in disordered organic semiconductors under typical conditions.

Findings

Transport energy varies significantly with temperature, electric field, and disorder.

Transport energy is invalid even at low electric fields and carrier concentrations.

The concept of transport energy cannot be universally applied in disordered organic semiconductors.

Abstract

A systematic study of the transport energy in disordered organic semiconductors based on variable range hopping theory has been presented here. The temperature, electric field, material disorder and carrier concentration dependent transport energy is extensively discussed. We demonstrate here, transport energy is not a general concept and invalid even in low electric field and concentration regime.