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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Turnbull, Graham Alexander
University of St Andrews
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2023Manipulation of structure and optoelectronic properties through bromine inclusion in a layered lead bromide perovskitecitations
- 2023Fluorescence lifetime imaging for explosive detectioncitations
- 2021Organic photovoltaics for simultaneous energy harvesting and high-speed MIMO optical wireless communicationscitations
- 2020Correlating Phase Behavior with Photophysical Properties in Mixed‐Cation Mixed‐Halide Perovskite Thin Filmscitations
- 2019Low threshold polariton lasing from a solution-processed organic semiconductor in a planar microcavitycitations
- 2018Improved organic semiconductor explosive sensors for application on minefields
- 2017An investigation of the energy levels within a common perovskite solar cell device and a comparison of DC/AC surface photovoltage spectroscopy Kelvin Probe measurements of different MAPBI3 perovskite solar cell device structurescitations
- 2016Nanoimprinted distributed feedback lasers of solution processed hybrid perovskitescitations
- 2016Self-trapping and excited state absorption in fluorene homo-polymer and copolymers with benzothiadiazole and tri-phenylaminecitations
- 2015Microstructured organic semiconductors
- 2015Solvent immersion nanoimprint lithography of fluorescent conjugated polymerscitations
- 2013LED pumped polymer laser sensor for explosivescitations
- 2009The Development of Luminescent Concentrators for Pumping Organic Semiconductor Laserscitations
- 2005Holographic recording of sub-micron period gratings and photonic crystals in the photoresist SU8citations
- 2003Polymer laser fabricated by a simple micromolding processcitations
- 2002Optical properties of a light-emitting polymer directly patterned by soft lithographycitations
- 2002Index and relief gratings in polymer films for organic distributed feedback laserscitations
- 2002Fabrication of refractive index and relief gratings in polymer films for DFB lasers
- 2002Emission characteristics and photonic band structure of microstructured polymer lasers
- 2002Photonic band structure and emission characteristics of a metal-backed polymeric distributed feedback lasercitations
- 2000Tuneability of amplified spontaneous emission through control of the waveguide-mode structure in conjugated polymer filmscitations
Places of action
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article
An investigation of the energy levels within a common perovskite solar cell device and a comparison of DC/AC surface photovoltage spectroscopy Kelvin Probe measurements of different MAPBI3 perovskite solar cell device structures
Abstract
<p>We present a study of the energy levels in a FTO/TiO<sub>2</sub>/CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>/Spiro solar cell device. The measurements are performed using a novel ambient pressure photoemission (APS) technique alongside Contact Potential Difference data from a Kelvin Probe. The Perovskite Solar Cell energy band diagram is demonstrated for the device in dark conditions and under illumination from a 150W Quartz Tungsten Halogen lamp. This approach provides useful information on the interaction between the different materials in this solar cell device. Additionally, non-destructive macroscopic DC and AC Surface Photovoltage Spectroscopy (SPS) studies are demonstrated of different MAPBI<sub>3</sub> device structures to give an indication of overall device performance. AC-SPS measurements, previously used on traditional semiconductors to study the mobility, are used in this case to characterise the ability of a perovskite solar cell device to respond rapidly to chopped light. Two different device structures studied showed very different characteristics: Sample A (without TiO<sub>2</sub>): (ITO/PEDOT:PSS/polyTPD/CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>/PCBM) had ∼4 times the magnitude of AC-SPS response compared to Sample B (including TiO<sub>2</sub>): (ITO/TiO<sub>2</sub>/ CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>/Spiro). This demonstrates that the carrier speed characteristics of device architecture A is superior to device architecture B. The TiO<sub>2</sub> layer has been associated with carrier trapping which is illustrated in this example. However, the DC-SPV performance of sample B is ∼5 times greater than that of sample A. The band gap of the MAPBI3 layer was determined through DC-SPS (1.57 ± 0.07 eV), Voc of the devices measured and qualitative observations made of interface trapping by DC light pulsing. The combination of these (APS, KP, AC/DC-SPV/SPS) techniques offers a more general method for measuring the energy level alignments and performance of Organic and Hybrid Solar Cell Devices.</p>