Determination of Charge-Carrier Mobility and Built-In Potential in Thin-Film
Organic M-I-M Diodes from Extraction-Current Transients

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)

Interna författare/redaktörer

Publikationens författare: Staffan Dahlström, Oskar J. Sandberg, Mathias Nyman, Ronald Österbacka
Förläggare: American Physical Society
Publiceringsår: 2018
Tidskrift: Physical Review Applied
Tidskriftsakronym: Phys. Rev. Applied
Volym: 10
Nummer: 5
Artikelns första sida, sidnummer: 054019-1
Artikelns sista sida, sidnummer: 054019-8


We have extended the Charge Extraction by a Linearly Increasing Voltage (CELIV) technique for

determination of the built-in potential and the charge-carrier mobility in thin-film metal-insulator-metal

(M-I-M) diodes. The validity of the presented analytical theory is verified by drift-diffusion simulations

and experimentally demonstrated on organic solar cells. In contrast to the original CELIV theory, which

assumes a uniform charge-carrier distribution in the active layer of the device, here we derive an analytical

expression for determining the built-in potential and mobility in the case of a nonuniform charge-carrier

distribution where charges have diffused into the active layer from the contacts. The extended CELIV theory

is applicable on all thin-film M-I-M diodes, e.g., organic solar cells. Drift-diffusion simulations show

that the error for mobility estimation can be an order of magnitude if not correcting for the carrier profile.


Senast uppdaterad 2020-06-06 vid 01:44