Composited Film of Poly(3,4-ethylenedioxythiophene) and Graphene Oxide as Hole Transport Layer in Perovskite Solar Cells.

Tian Yuan,Jin Li,Shimin Wang

doi:10.3390/polym13223895

Abstract

It is important to lower the cost and stability of the organic–inorganic hybrid perovskite solar cells (PSCs) for industrial application. The commonly used hole transport materials (HTMs) such as Spiro-OMeTAD, poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) and poly(3-hexylthiophene-2,5-diyl) (P3HT) are very expensive. Here, 3,4-ethylenedioxythiophene (EDOT) monomers are in-situ polymerized on the surface of graphene oxide (GO) as PEDOT-GO film. Compared to frequently used polystyrene sulfonic acid (PSS), GO avoids the corrosion of the perovskite and the use of H2O solvent. The composite PEDOT-GO film is between carbon pair electrode and perovskite layer as hole transport layer (HTL). The highest power conversion efficiency (PCE) is 14.09%.

Highlights

Renewable clean energy devices are urgently demanded for the sustainable development of society
The pattern of pure PEDOT depicts a broad peak in the region of 25.82◦, which corresponds to the polymer chain structure of PEDOT
This is due to the influence of conjugation and the coating effect of PEDOT on graphene oxide (GO) sheets, indicating that the in-situ polymerization changes the growth state of the polymer chain [14,17]

Summary

Introduction

Renewable clean energy devices are urgently demanded for the sustainable development of society. In the multi-layer structure of PSCs, the hole transport layer (HTL) is designed to promote the separation of electrons and holes, which is key to the performance and stability of the cell. Certain problems of HTL hinder the development and application of the PSCs technology. The HTL of PSCs are based on materials such as Spiro-OMeTAD, PTAA [3] and P3HT [4]. The costs of these materials are all prohibitively high for large-scale applications [5]. It is necessary to explore a low-cost and stable hole transport materials (HTMs) for the practical stage of PSCs

Methods

Results

Conclusion