Synthesis of C60 Fullerene Derivatives by Azide Alkyl Cyclo-addition and Their Optoelectronic Performance

Abstract

Abstract: A series of imino C₆₀ fullerene derivatives was synthesized through the cycloaddition reaction between C₆₀ and a long chain alkyl azide. The electrochemical properties and UV-Vis absorption spectra of these compounds were investigated. Polymer photovoltaic cells with these imino C₆₀ fullerene derivatives as the electron acceptor and MEH-PPV as the electron donor were fabricated and their performance was studied. The solubility in organic solvents and compatibility of these derivatives with conjugated polymer electron donor phase increases with the increasing of the length and number of alkyl linked to C₆₀ fullerene core. The energy conversion efficiency(ECE) and the short circuit current(I_<sup>sc ) also increase in the same sequence. The maximum short circuit current density(I_<sup>sc ) reached 1.77 mA/cm², close to that of the device fabricated from PCBM. Extremely high photo to dark current ratio makes these devices a good candidate for sensor application.

Key words: C₆₀, Fullerene, Alkyl azide, Imino C₆₀ fullerene, Polymer photovoltaic cell

CLC Number:

O641

TrendMD:

WANG Fei, ZHOU Qing-Mei, ZHENG Li-Ping, CAO Yong. Synthesis of C₆₀ Fullerene Derivatives by Azide Alkyl Cyclo-addition and Their Optoelectronic Performance[J]. Chem. J. Chinese Universities, 2005, 26(4): 719.

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Synthesis of C₆₀ Fullerene Derivatives by Azide Alkyl Cyclo-addition and Their Optoelectronic Performance

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