BiOI solar cells

Sfaelou, Stavroula; Raptis, Dimitrios; Dracopoulos, Vassilios; Lianos, Panagiotis

doi:10.1039/c5ra19835f

Cited by 47 publications

(40 citation statements)

References 17 publications

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“…The integrated J SC values of the EQE spectra closely matched the J SC values measured through current density-voltage (J-V) sweeps ( Table 1). An EQE of 80% exceeds the highest previously reported for BiOI [18] and is higher than recently reported EQEs from other bismuth halides and chalcohalides (discussed in the Introduction). [10,14,42] We found that we could further improve efficiency by lowering the deposition temperature of ZnO from 100 to 80 °C.…”

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confidence: 61%

“…These J SC values are almost double the highest previously reported for BiOI. [18] An important reason for the high performance of our devices is the densely packed morphology of the NiO x ( Figure S12, Supporting Information) and BiOI layers (Figure 3a,b), as well as our conformal AP-CVD ZnO layer (Figure 3a-c). These led to low leakage, as can be seen from the low reverse-bias dark current density of our optimized device (Figure 4a).…”

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confidence: 99%

“…[11,13,15] However, devices based on these materials have low reported power conversion efficiencies under AM 1.5G illumination, between 0.1 and 1.2%. [1] The short-circuit current densities (J SC , <4 mA cm −2 ) and external quantum efficiencies (EQEs, <60%) have also been poor, [1,18] in spite of efforts to extend the photoconversion range of bismuth halide semiconductors (J SC < 3.4 mA cm −2 , EQE < 25%). [14] Although higher efficiencies have been reported in bismuth-and antimony-based chalcogenides, [19][20][21][22] it is important to understand whether the broader range of ns 2 compounds predicted to be defect-tolerant could also exceed 1% power conversion efficiency and reach the levels needed for commercial production after optimization.…”

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confidence: 99%

“…[24,25] A recent report demonstrated a 1% BiOI photoelectrochemical cell under AM 1.5G illumination using an I 3 − /I − electrolyte with an EQE of up to 60%. [18] However, aside from improving the morphology of BiOI, it was unclear whether further increases in efficiency could be achieved. Critically, BiOI has recently been found to be unstable in 0.5 mol L −1 Na 2 SO 4 electrolyte, suggesting BiOI may be unstable in photoelectrochemical cells using liquid electrolytes.…”

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confidence: 99%

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Strongly Enhanced Photovoltaic Performance and Defect Physics of Air‐Stable Bismuth Oxyiodide (BiOI)

et al. 2017

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Bismuth‐based compounds have recently gained increasing attention as potentially nontoxic and defect‐tolerant solar absorbers. However, many of the new materials recently investigated show limited photovoltaic performance. Herein, one such compound is explored in detail through theory and experiment: bismuth oxyiodide (BiOI). BiOI thin films are grown by chemical vapor transport and found to maintain the same tetragonal phase in ambient air for at least 197 d. The computations suggest BiOI to be tolerant to antisite and vacancy defects. All‐inorganic solar cells (ITO|NiOx|BiOI|ZnO|Al) with negligible hysteresis and up to 80% external quantum efficiency under select monochromatic excitation are demonstrated. The short‐circuit current densities and power conversion efficiencies under AM 1.5G illumination are nearly double those of previously reported BiOI solar cells, as well as other bismuth halide and chalcohalide photovoltaics recently explored by many groups. Through a detailed loss analysis using optical characterization, photoemission spectroscopy, and device modeling, direction for future improvements in efficiency is provided. This work demonstrates that BiOI, previously considered to be a poor photocatalyst, is promising for photovoltaics.

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confidence: 61%

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confidence: 99%

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confidence: 99%

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Strongly Enhanced Photovoltaic Performance and Defect Physics of Air‐Stable Bismuth Oxyiodide (BiOI)

et al. 2017

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“…17 Many of these PIMs have recently been explored for photovoltaic applications. These include BiI 3 , 19,20 (CH 3 NH 3 ) 3 Bi 2 I 9 , [21][22][23][24] BiSI, 25,26 BiSeI, 25,26 K 3 Bi 2 I 9 , 27 Rb 3 Bi 2 I 9 , 27 Cs 3 Bi 2 I 9 , 27 BiOI, 28,29 Cs 3 Sb 2 I 9 , 30 SbSI, 31 SbSeI, 31 Sb 2 Se 3 , 32 CuSbSe 2 , 33,34 (CH 3 NH 3 ) 2 KBiCl 6 , 35 and SnS. 36 Many other recent works have been written on understanding the properties of hybrid lead-halide perovskites that make them excellent solar absorbers, e.g., energetic carrier screening via polarons, which may lead to new design rules.…”

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Perovskite-Inspired Photovoltaic Materials: Toward Best Practices in Materials Characterization and Calculations

et al. 2017

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ABSTRACT:Recently, there has been an explosive growth in research based on hybrid lead-halide perovskites for photovoltaics owing to rapid improvements in efficiency. The advent of these materials for solar applications has led to widespread interest in understanding the key enabling properties of these materials. This has resulted in renewed interest in related compounds and a search for materials that may replicate the defect-tolerant properties and long lifetimes of the hybrid lead-halide perovskites. Given the rapid pace of development of the field, the rises in efficiencies of these systems have outpaced the more basic understanding of these materials. Measuring or calculating the basic properties, such as crystal/electronic structure and composition, can be challenging because some of these materials have anisotropic structures, and/or are composed of both heavy metal cations and volatile, mobile, light elements. Some consequences are beam damage during characterization, composition change under vacuum, or compound effects, such as the alteration of the electronic structure through the influence of the substrate. These effects make it challenging to understand the basic properties integral to optoelectronic operation. Compounding these difficulties is the rapid pace with which the field progresses. This has created an ongoing need to continually evaluate best practices with respect to characterization and calculations, as well as to identify inconsistencies in reported values to determine if those inconsistencies are rooted in characterization methodology or materials synthesis. This article describes the difficulties in characterizing hybrid lead-halide perovskites and new materials, and how these challenges may be overcome. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 2 challenges discussed. The focus in this article is on crystallography, composition measurements, photoemission spectroscopy and calculations on perovskites and new, related absorbers. We suggest how some of the important artifacts could be avoided and how the reporting for each technique could be streamlined between groups to ensure reproducibility as the field progresses.

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Prospect for Bismuth/Antimony Chalcohalides‐Based Solar Cells

He,

Hu,

Liu

et al. 2023

Adv Funct Materials

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Inorganic–organic hybrid lead halide perovskites are emerging optoelectronic materials for solar cell application. However, the toxicity concerns and poor stability largely hamper their practical applications. For these reasons, the search for “perovskite‐inspired” alternatives, having the same advantages but overcoming the drawbacks of the lead‐based one, has become an important sector in the field. Among the candidates, Bi3+ and Sb3+ containing materials are of great interest, due to their electronic structures resembling the Pb2+. Bismuth/antimony chalcohalides have been known for a long time as the potential absorber in photovoltaics, even if their performances are still low. Interestingly, pnictogen chalcohalides can be the stepping stone toward numerous quaternary compounds, including some perovskite structures. The understanding of the fundamental properties and the current limitations of both the starting ternary compounds and the final quaternary materials can allow the achievement of improved photovoltaic absorbers, stable, and efficient. In this review, the fundamental properties and device performances of many ternary pnictogen chalcohalides and the derived quaternary compounds are summarized, focusing on the different preparation strategies.

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BiOI solar cells

Abstract: An inorganic solar cell was constructed using a thin compact supporting layer of titania with BiOI nanoflakes as a functional material, a Pt/FTO cathode and a I3−/I− redox electrolyte.

Cited by 47 publications

References 17 publications

Strongly Enhanced Photovoltaic Performance and Defect Physics of Air‐Stable Bismuth Oxyiodide (BiOI)

Strongly Enhanced Photovoltaic Performance and Defect Physics of Air‐Stable Bismuth Oxyiodide (BiOI)

Perovskite-Inspired Photovoltaic Materials: Toward Best Practices in Materials Characterization and Calculations

Prospect for Bismuth/Antimony Chalcohalides‐Based Solar Cells

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