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High Photon-to-Curr...
High Photon-to-Current Conversion in Solar Cells Based on Light-Absorbing Silver Bismuth Iodide
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- Zhu, Huimin (författare)
- Uppsala universitet,Fysikalisk kemi
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- Pan, Mingao (författare)
- Uppsala universitet,Fysikalisk kemi
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- Johansson, Malin B, 1972- (författare)
- Uppsala universitet,Fysikalisk kemi
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- Johansson, Erik (författare)
- Uppsala universitet,Fysikalisk kemi
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(creator_code:org_t)
- 2017-06-01
- 2017
- Engelska.
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Ingår i: ChemSusChem. - : WILEY-V C H VERLAG GMBH. - 1864-5631 .- 1864-564X. ; 10:12, s. 2592-2596
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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Abstract
Ämnesord
Stäng
- Here, a lead-free silver bismuth iodide (AgI/BiI3) with a crystal structure with space group R (3) over barm is investigated for use in solar cells. Devices based on the silver bismuth iodide deposited from solution on top of TiO2 and the conducting polymer poly(3-hexylthiophene-2,5-diyl) (P3HT) as a hole-transport layer are prepared and the photovoltaic performance is very promising with a power conversion efficiency over 2%, which is higher than the performance of previously reported bismuth-halide materials for solar cells. Photocurrent generation is observed between 350 and 700 nm, and the maximum external quantum efficiency is around 45%. The results are compared to solar cells based on the previously reported material AgBi2I7, and we observe a clearly higher performance for the devices with the new silver and bismuth iodides composition and different crystal structure. The X-ray diffraction spectrum of the most efficient silver bismuth iodide material shows a hexagonal crystal structure with space group R (3) over barm, and from the light absorption spectrum we obtain an indirect band gap energy of 1.62 eV and a direct band gap energy of 1.85 eV. This report shows the possibility for finding new structures of metal-halides efficient in solar cells and points out new directions for further exploration of lead-free metal-halide solar cells.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- perovskite solar cells
- power conversion efficiency
- silver bismuth iodide
- space group
- x-ray diffraction
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- art (ämneskategori)
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