The role of hole transport in hybrid inorganic/organic silicon/poly(3,4- ethylenedioxy-thiophene):poly(styrenesulfonate) heterojunction solar cells

Pietsch M, Bashouti MY, Christiansen S (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Journal of Physical Chemistry C American Chemical Society

Book Volume: 117

Pages Range: 9049-9055

Journal Issue: 18

DOI: 10.1021/jp308349f

Abstract

In this paper, the fundamental advantage of highly conductive transparent polymers as hole transport layers in hybrid solar cells is demonstrated. The substantial efficiency improvement of hybrid n-type silicon (n-Si)/poly(3,4- ethylenedioxy-thiophene):poly(styrenesulfonate) (PEDOT:PSS) solar cells by adding organic solvents to the polymer dispersion is investigated, and a model that explains reasons and mechanisms for that improvement is given. Open-circuit voltages of 600 mV were measured, which are comparable to conventional diffused silicon pn-junction wafer cells. It is shown by means of X-ray photoelectron spectroscopy that the PEDOT versus PSS ratio plays an important role for charge carrier transport in the PEDOT:PSS layer as well as for charge carrier separation at the n-Si/PEDOT:PSS interface. A shell of insulating PSS segregates at the surface of PEDOT:PSS grains and represents a considerable barrier for charge carrier transport and charge carrier separation, influencing the conductivity of the polymer film and the open-circuit voltage of a processed solar cell, respectively. It could be demonstrated that a mixing of the PEDOT:PSS polymer blend with the organic solvent dimethylsulfoxide reduces the PSS insulator segregation at the surface of PEDOT:PSS grains and improves the performance of hybrid n-Si/PEDOT:PSS solar cells. © 2013 American Chemical Society.

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Pietsch, M., Bashouti, M.Y., & Christiansen, S. (2013). The role of hole transport in hybrid inorganic/organic silicon/poly(3,4- ethylenedioxy-thiophene):poly(styrenesulfonate) heterojunction solar cells. Journal of Physical Chemistry C, 117(18), 9049-9055. https://doi.org/10.1021/jp308349f

MLA:

Pietsch, Matthias, Muhammad Y. Bashouti, and Silke Christiansen. "The role of hole transport in hybrid inorganic/organic silicon/poly(3,4- ethylenedioxy-thiophene):poly(styrenesulfonate) heterojunction solar cells." Journal of Physical Chemistry C 117.18 (2013): 9049-9055.

BibTeX: Download