READ ME This text describes the data presented in the paper: ======================== Introductory information ======================== Files included in the data deposit (include a short description of what data are contained): 1)CAD3_CAD4_abs.xlsx Normalised absorbance spectra of CAD3 and CAD4 in dichloromethane and acetonitrile. This data is presented in Figures S6 and S7 in the article. 2)CAD3_CAD4_kinetics.xlsx Kinetic traces taken from transient absorption experiments for CAD3 and CAD4. Included are traces for dyes in dichloromethane and adsorbed on nickel oxide films in the presence and absence of redox electrolyte. The data is presented in figure 3c and 3d in the article. 3)CAD3_CA4_vis_specechem.xlsx Spectroelectrochemical data for CAD3 and CAD4. The data is presented in figures S20 and S21 in the article. 4)CAD3_transient_abs_spectra.xlsx Transient absorption spectra of CAD3 in dichloromethane solution and adsorbed on nickel oxide films in the presence and absence of a redox electrolyte. The data is presented in figures 1a, 1b and S22-24 in the article. 5)CAD4_DCM_abs_emiss.xlsx Normalised absorbance and emission spectra of CAD4 in dichloromethane solution. The data is presented in figure S8 in the article. 6)CAD4_NiO_IR.xlsx Infrared spectra of nickel oxide films immobilsed of calcium fluoride windows, with and without CAD4 adsorbed on the surface. The data is presented in figure S10 in the article. 7)CAD4_transient_abs_spectra.xlsx Transient absorption spectra of CAD4 in dichloromethane solution and adsorbed on nickel oxide films in the presence and absence of a redox electrolyte. The data is presented in figures 1a, 1b and S25-S27 in the article. 8)Ground_state_IR_spectra.xlsx Infrared spectra of thiophene, triphenylamine, CAD acceptor, CAD3 precursor, CAD3 and CAD4. The data is presented in figure S9 in the article. Explain the relationship between multiple data sets, if required: Key words used to describe the data: Transient absorption, p-type semiconductor, dyes, spectroelectrochemistry, absorbance, emission ========================== Methodological information ========================== A brief method description – what the data is, how and why it was collected or created, and how it was processed: Instruments, hardware and software used: Transient absorption experiments were measured using laser flash photolysis and a pump-probe technique on the instruments at the Central Laser Facility, Dicot. The raw data was then processed in Origin 9.0. Kinetic traces were fit to single or multi exponentials using Origin 9.0. Lifetimes are given as amplitude weighted averages. Absorbance and emission spectra were collected at Newcastle University on an Ocean Optics USB2000 spectrometer or a Shimadzu fluorimeter respectively. Spectroelectrochemical data were recorded on an Ocean Optics USB2000 spectrometer and an Ivium CompactStat at Newcastle University. Infrared spectra were collected on a Varian Scimitar 800 FT-IR at Newcastle University. Date(s) of data collection: Transient absorption spectra were collected between the 7th and 11th September 2015. Infrared data was collected on the 12th and 26th October 2016. Absorbance and emission data were collected on the 29th June 2016. Spectroelectrochemical data were recorded on the 1st and 2nd of June 2016. Geographic coverage of data: Data validation (how was the data checked, proofed and cleaned): Process transient absorption data was checked by experts at the Central Laser Facility, Didcot. Overview of secondary data, if used: ========================= Data-specific information ========================= Definitions of names, labels, acronyms or specialist terminology uses for variables, records and their values: CAD3 and CAD4 refer to the dyes listed in the article. Explanation of weighting and grossing variables: Outline any missing data: ======= Contact ======= Please contact rdm@ncl.ac.uk for further information