The role of surface recombination on the performance of perovskite solar cells: effect of morphology and crystalline phase of TiO2 contact
| Autor: | Alison B. Walker, Nicola E. Courtier, Lidia Contreras-Bernal, Angel Barranco, Jesús Idígoras, Ana Borras, Juan A. Anta, James M. Cave, Juan R. Sanchez-Valencia |
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| Přispěvatelé: | Engineering and Physical Sciences Research Council (UK), European Commission, Junta de Andalucía, Ministerio de Economía y Competitividad (España), Universidad de Sevilla |
| Rok vydání: | 2018 |
| Předmět: |
Anatase
Materials science 02 engineering and technology Chemical vapor deposition 010402 general chemistry Perovskite 7. Clean energy 01 natural sciences law.invention law Phase (matter) Solar cell Perovskite (structure) business.industry Mechanical Engineering Hysteresis Drift‐diffusion modeling TiO contact 021001 nanoscience & nanotechnology Nanocrystalline material Recombination 0104 chemical sciences Amorphous solid Dielectric spectroscopy TiO2 contact drift-diffusion modeling 13. Climate action Mechanics of Materials Optoelectronics 0210 nano-technology business |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Idígoras, J, Contreras-Bernal, L, Cave, J M, Courtier, N E, Barranco, Á, Borras, A, Sánchez-Valencia, J R, Anta, J A & Walker, A B 2018, ' The Role of Surface Recombination on the Performance of Perovskite Solar Cells : Effect of Morphology and Crystalline Phase of TiO 2 Contact ', Advanced Materials Interfaces, vol. 5, no. 21, 1801076 . https://doi.org/10.1002/admi.201801076 |
| DOI: | 10.1002/admi.201801076 |
| Popis: | Herein, the preparation of 1D TiO nanocolumnar films grown by plasma-enhanced chemical vapor deposition is reported as the electron selective layer (ESL) for perovskite solar devices. The impact of the ESL architecture (1D and 3D morphologies) and the nanocrystalline phase (anatase and amorphous) is analyzed. For anatase structures, similar power conversion efficiencies are achieved using an ESL either the 1D nanocolumns or the classical 3D nanoparticle film. However, lower power conversion efficiencies and different optoelectronic properties are found for perovskite devices based on amorphous 1D films. The use of amorphous TiO as electron selective contact produces a bump in the reverse scan of the current–voltage curve as well as an additional electronic signal, detected by impedance spectroscopy measurements. The dependence of this additional signal on the optical excitation wavelength used in the IS experiments suggests that it stems from an interfacial process. Calculations using a drift-diffusion model which explicitly considers the selective contacts reproduces qualitatively the main features observed experimentally. These results demonstrate that for a solar cell in which the contact is working properly the open-circuit photovoltage is mainly determined by bulk recombination, whereas the introduction of a “bad contact” shifts the balance to surface recombination. The authors thank Junta de Andalucía for financial support via grant FQM 1851 and FQM 2310. The authors thank Ministerio de Economía y Competitividad of Spain and Agencia Estatal de Investigación (AEI) and EU (FEDER) under grants MAT2013‐47192‐C3‐3‐R, MAT2016‐76892‐C3‐2‐R, MAT2016‐79866‐R and Red de Excelencia “Emerging photovoltaic Technologies” for financial support. J.R.S.‐V. and A.B. acknowledge Marie Skłodowska‐Curie ActionsH2020‐MSCA‐IF‐2014 PlasmaPerovSol grant (Project ID 661480) and the University of Seville through the VI PPIT‐US. J.M.C. and N.E.C. were supported by EPSRC funded studentships from the CDT in New and Sustainable Photovoltaics (reference EP/L01551X/1). A.B.W. was supported by the Energy oriented Centre of Excellence (EoCoE), Horizon2020 grant research number 676629. |
| Databáze: | OpenAIRE |
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