Unraveling the Photoluminescence of Inorganic-Organic Perovskites
Dave Worsley a, Joel Troughton a, Cecile Charbonneau a, Matt Carnie a, Trystan Watson a, Ana Teloeken a, Matthew Davies a, James Durrant a c, Peter Douglas b
a SPECIFIC, Swansea University, Baglan Bay Innovation and Knowledge Centre, Baglan, SA12 7AX, United Kingdom
b Chemistry Group, College of Engineering, Swansea University, Singleton Park Swansea, SA2 8PP
c Department of Chemistry, University of New Brunswick, P O Box 4400, Fredericton
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Swansea, United Kingdom, 2016 June 29th - July 1st
Organizers: James Durrant, Henry Snaith and David Worsley
Oral, Matthew Davies, presentation 126
Publication date: 28th March 2016

Photoluminescence (PL) of perovskite thin-films is not as straightforward as initially thought highlighting the sometimes-surprising nature of these materials, here we attempt to unravel the PL data and discuss what this can actually tell us about these materials. We report the characteristics of a series of perovskites with various halide combinations studied via fluorescence spectroscopy and fluorescence microscopy (FM) coupled with an optical fibre spectrometer. This provides information on the bulk and local photoluminescence (PL) and allows us to map the surface of the films and monitor the evolution of photoluminescence with time exposed to various controlled environments. We have followed the evolution of PL upon crystallisation and subsequent degradation of perovskite films. Here we attempt to correlate the PL, crystal size, structure and coverage with overall PV device efficiency and stability. We have studied the effect of annealing temperature and rate of heating on the crystallisation and PL, including the effect of plasmonic1 and near-infrared2 heating that we have previously shown to complete the crystallisation of perovskites in extremely short timescales (ms and s respectively). As expected the heating profile has a large effect on the crystal structure and stability of the crystallised film. We have also expanded the set up to look at the PL under varying light bias to shed light on the efficiency of electron selective and hole selective layers. This is potentially a fast and straight forward screening method that does not need the manufacture of a complete device to evaluate and optimise the device stack.

 



© FUNDACIO DE LA COMUNITAT VALENCIANA SCITO
We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info