Solvent-Mediated Crystallization of CH3NH3SnI3Films for Heterojunction Depleted Perovskite Solar Cells

Hao, Feng; Stoumpos, Constantinos C.; Guo, Peijun; Zhou, Nan; Marks, Tobin J.; Chang, Robert P. H.; Kanatzidis, Mercouri G.

doi:10.1021/jacs.5b06658

Cited by 666 publications

(615 citation statements)

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“…PCEs of 6.4% and 5.73% were reported, respectively, and after three years they are still the record efficiencies among MASnX 3 ‐based PSCs (Figure 3c). This dramatic different situation from the lead‐based perovskite can be understood by the fact that Sn‐based perovskites are prone to self‐doping in ambient air resulting in instability and poor reproducibility 46, 47, 48, 51, 52, 53, 135…”

Section: Lead‐free Halide Hybrid Perovskite and Related Absorbersmentioning

confidence: 99%

“…The author has concluded that the SnF 2 cannot only improve interfacial energy alignment but also increase stability to electron beam damage. Nowadays, most Sn‐based perovskites films prepared by solution deposition need additional SnF 2 to get good performance,47, 48, 57, 58, 73 including the recent (FA) 0.75 (MA) 0.25 SnI 3 based PSCs with the highest PCE of 8.12% 56. Additionally, Ma et al134 claimed that SnF 2 as the inhibitor of Sn 2+ oxidation in the MASnI 3 film could increase the fluorescence lifetime up to 10 times and give longer carrier diffusion lengths >500 nm, compared with pristine MASnI 3 films.…”

Section: Lead‐free Halide Hybrid Perovskite and Related Absorbersmentioning

confidence: 99%

“…The work on solvent engineering of Sn‐based perovskite was first reported by Hao et al,47 where they investigated the solvent effects on the crystallization of the MASnI 3 perovskite films. They found that highly uniform, pinhole‐free perovskite films can be obtained by using a dimethyl sulfoxide (DMSO) as solvents in perovskite precursor.…”

Section: Lead‐free Halide Hybrid Perovskite and Related Absorbersmentioning

confidence: 99%

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Lead‐Free Hybrid Perovskite Absorbers for Viable Application: Can We Eat the Cake and Have It too?

2017

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Many years since the booming of research on perovskite solar cells (PSCs), the hybrid perovskite materials developed for photovoltaic application form three main categories since 2009: (i) high‐performance unstable lead‐containing perovskites, (ii) low‐performance lead‐free perovskites, and (iii) moderate performance and stable lead‐containing perovskites. The search for alternative materials to replace lead leads to the second group of perovskite materials. To date, a number of these compounds have been synthesized and applied in photovoltaic devices. Here, lead‐free hybrid light absorbers used in PV devices are focused and their recent developments in related solar cell applications are reviewed comprehensively. In the first part, group 14 metals (Sn and Ge)‐based perovskites are introduced with more emphasis on the optimization of Sn‐based PSCs. Then concerns on halide hybrids of group 15 metals (Bi and Sb) are raised, which are mainly perovskite derivatives. At the same time, transition metal Cu‐based perovskites are also referred. In the end, an outlook is given on the design strategy of lead‐free halide hybrid absorbers for photovoltaic applications. It is believed that this timely review can represent our unique view of the field and shed some light on the direction of development of such promising materials.

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Section: Lead‐free Halide Hybrid Perovskite and Related Absorbersmentioning

confidence: 99%

Section: Lead‐free Halide Hybrid Perovskite and Related Absorbersmentioning

confidence: 99%

Section: Lead‐free Halide Hybrid Perovskite and Related Absorbersmentioning

confidence: 99%

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Lead‐Free Hybrid Perovskite Absorbers for Viable Application: Can We Eat the Cake and Have It too?

2017

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“…For example, SnF 2 , as an additive, has been found to effectively suppress the doped hole density in Sn‐based perovskites and improve device stability and reproducibility 16, 17. The use of dimethyl sulfoxide (DMSO) as the precursor solvent has proven to be crucial in acquiring homogeneous films, as it forms a SnI 2 ·3DMSO intermediate phase that retards the rapid crystallization of Sn‐based perovskites 18. Seo and co‐workers employed a SnF 2 ‐pyrazine complex to improve the morphology of FASnI 3 films and obtained a PCE of 4.8% 19.…”

Section: Introductionmentioning

confidence: 99%

Mixed‐Organic‐Cation Tin Iodide for Lead‐Free Perovskite Solar Cells with an Efficiency of 8.12%

et al. 2017

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In this work, a fully tin‐based, mixed‐organic‐cation perovskite absorber (FA)x(MA)1− xSnI3 (FA = NH2CH = NH2 +, MA = CH3NH3 +) for lead‐free perovskite solar cells (PSCs) with inverted structure is presented. By optimizing the ratio of FA and MA cations, a maximum power conversion efficiency of 8.12% is achieved for the (FA)0.75(MA)0.25SnI3‐based device along with a high open‐circuit voltage of 0.61 V, which originates from improved perovskite film morphology and inhibits recombination process in the device. The cation‐mixing approach proves to be a facile method for the efficiency enhancement of tin‐based PSCs.

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“…Thus, researchers have begun to explore related materials with a lower toxicity and/or better stability. [6][7][8] Meanwhile, the past few years have seen the renaissance of photoferroelectric materials for PV applications. [9][10][11][12] Photoferroelectric materials, such as BiFeO 3 and SbSI, are semiconducting ferroelectrics that show both photosensitive and ferroelectric properties.…”

Section: Introductionmentioning

confidence: 99%

A semiconducting molecular ferroelectric with a bandgap much lower than that of BiFeO3

Tang

Liao

et al. 2017

NPG Asia Mater

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Ferroelectrics have been attracting increasing attention as good candidates for multifunctional materials because of their fascinating properties. However, their large bandgap has been a roadblock limiting their application in optoelectronics and photovoltaics, among other applications. Hybrid ferroelectrics have the potential to combine the advantages of both molecular materials and ferroelectrics. In this context, we designed a hybrid ferroelectric: (2-(ammoniomethyl)pyridinium)SbI 5 . It shows an above-room-temperature Curie temperature (T c = 360 K), a large spontaneous polarization (P s = 4 μC cm − 2 ) and a small bandgap (2.03 eV) that is much smaller than the recently reported 2.7-3.65 eV for the lead-halide perovskite ferroelectrics. The implementation of ferroelectricity in hybrid semiconducting materials may be a feasible way to realize high-performance ferroelectric optoelectronic and photovoltaic devices. NPG Asia Materials (2017) 9, e342; doi:10. 1038/am.2016.193; published online 20 January 2017 INTRODUCTIONIntensive research on photovoltaic (PV) materials over the past six decades has been driven by the increasingly serious energy crisis. Among the emerging PV technologies, hybrid perovskite solar cells demonstrate extraordinary power conversion efficiencies and very low cost. 1-5 The high power conversion efficiency (up to 20.1%) is because of the strong light absorption and high carrier mobility of hybrid perovskites. Nevertheless, much work needs to be done to overcome their instability in moisture and the toxicity of lead. Thus, researchers have begun to explore related materials with a lower toxicity and/or better stability. [6][7][8] Meanwhile, the past few years have seen the renaissance of photoferroelectric materials for PV applications. [9][10][11][12] Photoferroelectric materials, such as BiFeO 3 and SbSI, are semiconducting ferroelectrics that show both photosensitive and ferroelectric properties. They adopt a newly described mechanism known as the anomalous PV effect, where photogenerated electrons and holes are directly separated by the spontaneous electric field from the intrinsic ferroelectric polarization, resulting in an open circuit voltage above the bandgap. However, the power conversion efficiency of conventional inorganic ferroelectrics remains low because of the poor light absorption ability that is limited by their large bandgaps.Organic-inorganic hybrid ferroelectrics have the potential to combine advantages from both hybrid materials and ferroelectrics. We recently demonstrated that photoferroelectricity can be achieved in lead-halide perovskite-type ferroelectrics. 13,14 Although these compounds show excellent ferroelectricity, they have two drawbacks: a relatively high bandgap (42.7 eV) and toxicity from the Pb element.

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Solvent-Mediated Crystallization of CH₃NH₃SnI₃Films for Heterojunction Depleted Perovskite Solar Cells

Cited by 666 publications

References 61 publications

Lead‐Free Hybrid Perovskite Absorbers for Viable Application: Can We Eat the Cake and Have It too?

Lead‐Free Hybrid Perovskite Absorbers for Viable Application: Can We Eat the Cake and Have It too?

Mixed‐Organic‐Cation Tin Iodide for Lead‐Free Perovskite Solar Cells with an Efficiency of 8.12%

A semiconducting molecular ferroelectric with a bandgap much lower than that of BiFeO3

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