Abdi Jalebi, Mojtaba;
Dar, M Ibrahim;
Sadhanala, Aditya;
Senanayak, Satyaprasad P;
Grätzel, Michael;
Friend, Richard H;
(2017)
Interface engineering of mesoscopic hybrid organic-inorganic perovskite solar cells.
Presented at: The PhotoVoltaic Technical Conference 2017 (PVTC 2017), Marseille, France.
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Abstract
We report on the optimization of the interfacial properties of titania in mesoscopic CH3NH3PbI3 perovskite solar cells (PSCs). Modification of the mesoporous titania (mp-TiO2) film by TiCl4 treatment substantially reduced the surface traps, as is evident from the sharpness of the absorption edge with a significant reduction in Urbach energy (from 320 to 140 meV) determined from photothermal deflection spectroscopy, and led to an order of magnitude enhancement in the bulk electron mobility and corresponding decrease in the transport activation energy (from 170 to 90 meV) within a device. After optimization of the photoanode–perovskite interface using various sizes of TiO2 nanoparticles, the best photovoltaic efficiency of 16.3% was achieved with the mesoporous TiO2 composed of 36 nm sized nanoparticles. The improvement in device performance can be attributed to the enhanced charge collection efficiency that is driven by improved charge transport in the mesoporous TiO2 layer. Also, the decreased recombination at the TiO2–perovskite interface and better perovskite coverage play important roles.
| Type: | Conference item (Presentation) |
|---|---|
| Title: | Interface engineering of mesoscopic hybrid organic-inorganic perovskite solar cells |
| Event: | The PhotoVoltaic Technical Conference 2017 (PVTC 2017) |
| Location: | Marseille, France |
| Dates: | 26 - 28 April 2017 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://www.supersolar-hub.org/event/save-the-date... |
| Language: | English |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10160149 |
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