Capacitance Spectroscopy for Quantifying Recombination Losses in Nonfullerene Small‐Molecule Bulk Heterojunction Solar Cells | Zendy

Brus Viktor V. | Zendy; Proctor Christopher M. | Zendy; Ran Niva A. | Zendy; Nguyen ThucQuyen | Zendy

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Capacitance Spectroscopy for Quantifying Recombination Losses in Nonfullerene Small‐Molecule Bulk Heterojunction Solar Cells

Author(s) -

Brus Viktor V.,

Proctor Christopher M.,

Ran Niva A.,

Nguyen ThucQuyen

Publication year - 2016

Publication title -

advanced energy materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 10.08

H-Index - 220

eISSN - 1614-6840

pISSN - 1614-6832

DOI - 10.1002/aenm.201502250

Subject(s) - materials science , polymer solar cell , organic solar cell , perylene , capacitance , recombination , diimide , optoelectronics , spectroscopy , heterojunction , chemical physics , solar cell , molecule , chemistry , physics , polymer , electrode , biochemistry , organic chemistry , quantum mechanics , composite material , gene

The light intensity dependence of the main photoelectrical parameters of the nonfullerene small‐molecule bulk heterojunction (BHJ) solar cells p‐DTS(FBTTh 2 ) 2 :perylene diimide (T1:PDI) shows that the nongeminate recombination losses play an important role in this system. A simple approach for the quantitative analysis of capacitance spectroscopy data of the organic BHJ solar cells, which allows to determine the density of free charge carriers as a function of applied bias under standard working conditions, is demonstrated. Using the proposed capacitance spectroscopic technique, the nongeminate recombination losses in the T1:PDI solar cells are quantitatively characterized in the scope of the bimolecular‐ and trap‐assisted recombination mechanisms. Their contributions are separately analyzed within a wide range of the applied bias.

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