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https://hdl.handle.net/20.500.14279/18313
Τίτλος: | Fullerene-free organic solar cells with an efficiency of 3.7% based on a low-cost geometrically planar perylene diimide monomer | Συγγραφείς: | Singh, R. Aluicio-Sarduy, Eduardo Kan, Z. Ye, T. Mackenzie, R. C.I. Keivanidis, Panagiotis E. |
Major Field of Science: | Engineering and Technology | Field Category: | Electrical Engineering - Electronic Engineering - Information Engineering | Ημερομηνία Έκδοσης: | 21-Σεπ-2014 | Πηγή: | Journal of Materials Chemistry A, 2014, vol. 2, iss. 35, pp. 14348-14353 | Volume: | 2 | Issue: | 35 | Start page: | 14348 | End page: | 14353 | Περιοδικό: | Journal of Materials Chemistry A | Περίληψη: | The aggregate-induced limitation for high power-conversion efficiencies (PCEs) of perylene-diimide (PDI):polymer solar cells can be circumvented when two simple rules are respected; the aggregate size of PDI remains short enough and the omnipresent PDI aggregates are electronically interconnected. Following these guidelines, a PCE of 3.7% is delivered by using the solution-processable, planar PDI monomer of N,N′-bis(1-ethylpropyl)-perylene-3,4,9,10- tetracarboxylic diimide as the electron acceptor mixed with the low-energy gap polymeric donor poly[(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b;4,5- b′]dithiophene)-2,6-diyl-alt-(4-(2-ethylhexanoyl)-thieno[3,4-b]thiophene)) -2,6-diyl] (PBDTTT-CT). The PBDTTT-CT:PDI composite absorbs strongly the light in the region of 400 nm-800 nm and after adding a small amount of 1,8-diiodooctane (DIO) efficient photocurrent generation is achieved. Space-charge limited dark current and transient photovoltage measurements suggest that the use of the DIO component optimizes the electron/hole carrier mobility ratio, suppresses the non-geminate recombination losses and improves the charge extraction efficiency. © the Partner Organisations 2014. | ISSN: | 20507496 | DOI: | 10.1039/c4ta02851a | Rights: | © Royal Society of Chemistry | Type: | Article | Affiliation: | Fondazione Istituto Italiano di Tecnologia University of Nottingham |
Publication Type: | Peer Reviewed |
Εμφανίζεται στις συλλογές: | Άρθρα/Articles |
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