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

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%.

Investigation of the Performance of Perovskite Solar Cells with ZnO-Covered PC61BM Electron Transport Layer

“…Among the possible alternative energies, solar energy is undoubtedly the most valued energy source, and it might completely replace fossil energy in order to mitigate environmental pollution in the future [ 2 ]. There are several kinds of solar cells, such as organic solar cells [ 3 , 4 ], inorganic solar cells [ 5 , 6 ], perovskite solar cells (PSCs) [ 7 , 8 , 9 , 10 , 11 , 12 ], and so on. Nevertheless, in view of their advantages in terms of inexpensiveness, good flexibility, high carrier mobility, long carrier diffusion length, and high performance, organic–inorganic halide perovskite solar cells have become the most promising and attractive candidates for alternative energy sources [ 13 , 14 ].Over the past few years, the power conversion efficiency (PCE) of perovskite solar cells has increased from 3.8% to 25.5%, which is very close to the current PCE of crystalline silicon (c-Si) solar cells [ 15 ].…”

Hofmeister Series for Conducting Polymers: The Road to Better Electrochemical Activity?

“…The use of PEDOT:PSS aqueous dispersions has proven to be very attractive for producing films of varying thicknesses on both conductive and non-conductive substrates, and has opened up the possibility of using many common coating and printing techniques such as drop casting, spin coating, spray coating, inkjet printing, and screen printing. These advantages have made PEDOT:PSS one of the most commercially successful conducting polymers [3] and it is now actively used in solar cells [4][5][6], LEDs [7,8], field effect transistors [9], thermoelectric devices [10,11], electrochromic devices [12], and sensors [13].…”