Investigation of transport properties in polymer/fullerene blends using time-of-flight photocurrent measurements

Autor:	Donal D. C. Bradley, Theo Kreouzis, Youngkyoo Kim, Jenny Nelson, James R. Durrant, Stelios A. Choulis, D. Poplavskyy
Přispěvatelé:	Χούλης, Στέλιος Α.
Rok vydání:	2003
Předmět:	Solar cells Photocurrent Electron mobility Materials science Fullerene Physics and Astronomy (miscellaneous) Polymers Photoconductivity Analytical chemistry Esters Electron law.invention Blends Chemical physics law ENGINEERING AND TECHNOLOGY Solar cell Fullerenes Polymer blend Order of magnitude
Zdroj:	Applied Physics Letters. 83:3812-3814
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.1624636
Popis:	The electron and hole transport properties of blends of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1-4-phenylene vinylene], (MDMO-PPV) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) are investigated at room temperature using time-of-flight photocurrent measurements as a function of blend composition and laser excitation intensity. The experimental results are consistent with the notion of a mobility edge for holes in this material that delineates long-lived trapping and mobile carrier states. Electron transport in PCBM appears to be less dispersive than that of holes in MDMO-PPV in the blend, with electron mobilities in the former exceeding hole mobilities in the latter by up to two orders of magnitude. Photocurrent generation in corresponding solar cell devices may therefore be limited by the low hole mobility of MDMO-PPV.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03dfc52726ada51d90b808cb8a0b35c1 https://doi.org/10.1063/1.1624636 Zobrazit plný text záznamu