Solution-processed mesoscopic Bi2S3: polymer photoactive layers

Andrew J. MacLachlan, Flannan T. F. O'Mahony, Anna L. Sudlow, Michael S. Hill, Kieran C. Molloy, Jenny Nelson, Saif A. Haque

Research output: Contribution to journalArticlepeer-review

31 Citations (SciVal)


The fabrication of solution-processed nontoxic mesoporous Bi2S3 structures is demonstrated and the suitability of these structures for use in hybrid solar cells investigated. Mesoporous Bi2S3electrodes are prepared via thermal decomposition of a thin film composed of a bismuth xanthate single source precursor. The resultant Bi2S3films are made up of regular needles with approximate dimensions of 50×500 nm, as confirmed by scanning electron microscopy (SEM). The crystallinity of the Bi2S3 is found to be dependent on the annealing temperature, as determined by X-ray diffraction. The porous Bi2S3 films are infiltrated with the hole conductor P3HT to generate novel hybrid films, and laser-based transient absorption spectroscopy is used to interrogate the charge-separation reaction at the resulting Bi2S3/P3HT heterojunction. Specifically, optical excitation of the hybrid films results in efficient and long-lived charge separation (microsecond to
millisecond timescale), thereby rendering such films suitable for the development of novel low-cost solar-energy conversion devices.

Original languageEnglish
Pages (from-to)1019-1023
Number of pages5
Issue number6
Early online date5 Mar 2014
Publication statusPublished - 14 Apr 2014


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