A paradigmatic change: Linking fullerenes to electron acceptors

Feng L, Rudolf M, Wolfrum S, Troeger A, Slanina Z, Akasaka T, Nagase S, Martin N, Ameri T, Brabec C, Guldi DM (2012)

Publication Type: Journal article, Original article

Publication year: 2012

Journal

Original Authors: Feng L., Rudolf M., Wolfrum S., Troeger A., Slanina Z., Akasaka T., Nagase S., Martin N., Ameri T., Brabec C.J., Guldi D.M.

Publisher: American Chemical Society

Book Volume: 134

Pages Range: 12190-12197

Journal Issue: 29

DOI: 10.1021/ja3039695

Abstract

The potential of Lu N@C and its analogues as electron acceptors in the areas of photovoltaics and artificial photosynthesis is tremendous. To this date, their electron-donating properties have never been explored, despite the facile oxidations that they reveal when compared to those of C . Herein, we report on the synthesis and physicochemical studies of a covalently linked Lu N@C -perylenebisimide (PDI) conjugate, in which PDI acts as the light harvester and the electron acceptor. Most important is the unambiguous evidence-in terms of spectroscopy and kinetics-that corroborates a photoinduced electron transfer evolving from the ground state of Lu N@C to the singlet excited state of PDI. In stark contrast, the photoreactivity of a C -PDI conjugate is exclusively governed by a cascade of energy-transfer processes. Also, the electron-donating property of the Lu N@C moiety was confirmed through constructing and testing a bilayer heterojunction solar cell device with a PDI and Lu N@C derivative as electron acceptor and electron donor, respectively. In particular, a positive photovoltage of 0.46 V and a negative short circuit current density of 0.38 mA are observed with PDI/Ca as anode and ITO/Lu N@C as cathode. Although the devices were not optimized, the sign of the V and the flow direction of J clearly underline the unique oxidative role of Lu N@C within electron donor-acceptor conjugates toward the construction of novel optoelectronic devices. © 2012 American Chemical Society.

Authors with CRIS profile

Involved external institutions

University of Tsukuba / 筑波大学 Japan (JP) Kyoto University / 京都大学 Kyōto daigaku Japan (JP) Universidad Complutense de Madrid (UCM) Spain (ES)

How to cite

APA:

Feng, L., Rudolf, M., Wolfrum, S., Troeger, A., Slanina, Z., Akasaka, T.,... Guldi, D.M. (2012). A paradigmatic change: Linking fullerenes to electron acceptors. Journal of the American Chemical Society, 134(29), 12190-12197. https://dx.doi.org/10.1021/ja3039695

MLA:

Feng, Lai, et al. "A paradigmatic change: Linking fullerenes to electron acceptors." Journal of the American Chemical Society 134.29 (2012): 12190-12197.

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