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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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Remmerswaal, Willemijn H. M.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2024Unraveling the Positive Effects of Glycine Hydrochloride on the Performance of Pb–Sn-Based Perovskite Solar Cells
- 2024Unraveling the Positive Effects of Glycine Hydrochloride on the Performance of Pb–Sn-Based Perovskite Solar Cells
- 2024Identifying the Nature and Location of Defects in n–i–p Perovskite Cells with Highly Sensitive Sub-Bandgap Photocurrent Spectroscopycitations
- 2024Quantifying Non-Radiative Recombination in Passivated Wide-Bandgap Metal Halide Perovskites Using Absolute Photoluminescence Spectroscopycitations
- 20233D Perovskite Passivation with a Benzotriazole-Based 2D Interlayer for High-Efficiency Solar Cellscitations
- 20233D perovskite passivation with a benzotriazole-based 2D interlayer for high-efficiency solar cellscitations
- 2022Monolithic All-Perovskite Tandem Solar Cells with Minimized Optical and Energetic Lossescitations
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article
Identifying the Nature and Location of Defects in n–i–p Perovskite Cells with Highly Sensitive Sub-Bandgap Photocurrent Spectroscopy
Abstract
Defects that exist in perovskite semiconductors and at their interfaces with charge transport layers limit the performance of perovskite solar cells (PSCs). Highly sensitive photocurrent measurements reveal at least two sub-bandgap defect states in n–i–p PSCs that use tin oxide covered with [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM) as the electron transport layer and tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as the hole transport layer. Semitransparent PSCs with an optical spacer-mirror bilayer on top are used to modulate the interference of light. By varying the thickness of the optical spacer and analyzing the changes in the photocurrent spectra using optical simulations, the defect states that produce photocurrent with sub-bandgap excitation are found to be located near the PCBM-perovskite interface. This conclusion is supported by quasi-Fermi level splitting measurements on perovskite n–i–p half stacks. The observations are explained by an enhanced extraction of trapped electrons from the perovskite at the interface with PCBM.