Spectral response measurements of Perovskite solar cells
journal contributionposted on 30.10.2018, 13:58 authored by Martin BlissMartin Bliss, Alex SmithAlex Smith, Tom BettsTom Betts, Jenny Baker, Francesca De Rossi, Sai Bai, Trystan Watson, Henry Snaith, Ralph Gottschalg
A new spectral response measurement routine is proposed that is universally applicable for all perovskite devices. It is aimed at improving measurement accuracy and repeatability of spectral response curves and current-voltage curve spectral mismatch factor corrections. Frequency response, effects of preconditioning as well as dependency on incident light intensity and voltage load on spectral response measurements are characterized on two differently structured perovskite device types. It is shown that device preconditioning affects the spectral response shape, causing errors in spectral mismatch factor corrections of up to 0.8% when using a reference cell with a good spectral match and a class A solar simulator. Wavelength dependent response to incident light intensity and voltage load is observed on both device types, which highlights the need to measure at short circuit current and maximum power point to correct spectral mismatch. The method with recommendations given ensures the correct measurement conditions are applied and measurements are corrected for instability in performance.
The authors are grateful for funding of this work through the EPSRC SUPERGEN SuperSolar Hub (EP/J017361/1). This project has received funding from the EMPIR programme cofinanced by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. The main author also received support from the British Council Newton Fund Institutional Link Project: Enhancement of Photovoltaic and Wind Turbine Performance for High Temperature and Low Wind Speed Environments.
- Mechanical, Electrical and Manufacturing Engineering