Simple characterization of electronic processes in perovskite photovoltaic cells

Abstract

Electronic properties of perovskite lead-halide photovoltaic cells have been studied. The dc current/voltage characteristics were found to be well fitted by a standard diode equation under optical excitation and in the dark, while the impedance spectroscopy revealed a pronounced slow process under light illumination, which is absent in the dark. A simple model is proposed, which can explain all aspects of the observed behavior quantitatively and consistently.

Effect of Carrier Transport in NiO on the Photovoltaic Properties of Lead Iodide Perovskite Solar Cells

“…After cleaning the surface of the NiO x layer, the perovskite and PCBM layers were prepared and deposited as reported. 14,17,18 After Ag deposition, the devices were sealed by a glass plate. The current density-voltage (J-V ) characteristics was measured by a solar simulator system (Asahi Spectra Co. Ltd., California, USA).…”

“…The J-V curve of the cells containing PEDOT:PSS is ideally fitted by the one or two diode models. 14,15 Therefore, in case of PEDOT:PSS, we assumed that the electrons in the conduction band of the perovskite directly recombine with the hole in the valence band of PEDOT:PSS, or recombine through the in-gap recombination centers in the bulk perovskite (the ShockleyRead-Hall mechanism). On the other hands, the J-V curve of the cells containing NiO x is not ideal.…”

“…1,2 Planar type perovskite solar cells have been developed to circumvent the complicated analysis of perovskite semiconductor in mesoporous structure, and to produce the perovskite solar cells via lower temperature processes. [7][8][9][10][11][12][13][14][15][16][17][18] We have demonstrated that the solar cells consisting of Tin-doped indium oxide (ITO)/Poly (3,4-ethylenedioxythiophene): Poly(styrenesulfonate) (PEDOT:PSS)/Perovskite/Phenyl-C61-Butyric-Acid-Methyl Ester (PCBM)/Ag ( Fig. 1) have the ideal diode properties and high reproducibility.…”

“…1) have the ideal diode properties and high reproducibility. [14][15][16][17][18] From the Mott-Schottky plot, the perovskite solar cells can be considered as pin structure, consisting of p-type/ intrinsic/n-type semiconductors. 15 Recently, several hole transport materials (HTM) have also been introduced into the perovskite solar cells in place of PEDOT:PSS to obtain probable device application or efficient devices.…”

Tracking the formation of methylammonium lead triiodide perovskite

“…Understanding the formation mechanisms in CH 3 NH 3 PbI 3 perovskite is of great importance for device design and optimization, 18 and in relating models of device performance 19 to material properties. However, CH 3 NH 3 PbI 3 films are typically characterized only by X-ray diffraction (XRD), and usually only by identifying the (110) and (220) diffraction peaks characteristic of the perovskite structure.…”