Charge transport mechanism in high-mobility organic semiconductors · revision history

Revision 2

Accepted · core change · record

Changes against revision 1:

Title
Charge transport mechanism in high-mobility organic semiconductors
Plain
In organic crystals such as rubrene, charges move in a way that fits neither the picture of free electrons in a metal nor that of hops between fixed molecules. A complete theory that predicts the measured mobility (how fast charges drift in an electric field) is missing.
Precise · changed · core
Revision 1: For high-mobility organic semiconductors (rubrene, pentacene, C8-BTBT) at 100 to 300 K, with transfer integrals of order 0.1 eV comparable to thermal fluctuations of these integrals, predict the mobility $\mu(T)$ (measured about 3e3 to 1.2e4 $\mathrm{cm}^2/(\mathrm{statvolt}\ \mathrm{s})$ at room temperature in rubrene single crystals, lower in pentacene and C8-BTBT) and its temperature dependence from a microscopic model with ab initio parameters, deciding between transient localization, small-polaron and band pictures. An answer is a theory reproducing $\mu(T)$ and the Hall and terahertz data.
Revision 2: For high-mobility organic semiconductors (rubrene, pentacene, C8-BTBT) at 100 to 300 K, with transfer integrals of order 0.1 eV comparable to thermal fluctuations of these integrals, predict the mobility $\mu(T)$ (measured about $3 \times 10^{3}$ to $1.2 \times 10^{4}$ $\mathrm{cm}^2/(\mathrm{statvolt}\ \mathrm{s})$ at room temperature in rubrene single crystals, lower in pentacene and C8-BTBT) and its temperature dependence from a microscopic model with ab initio parameters, deciding between transient localization, small-polaron and band pictures. An answer is a theory reproducing $\mu(T)$ and the Hall and terahertz data.
Settled by
Ab initio parametrized nonadiabatic or quantum transport calculations reproducing mobility, Hall effect and optical conductivity on single crystals.
Kind
phenomenon
Answer type
mechanism
References
(empty)
Literature status
open
Status note
(empty)
Posed since
(empty)

Decisions