Two-dimensional lead-free iodide-based hybrid double perovskites: crystal growth, thin-film preparation and photocurrent responses

Bi, Le-Yu; Hu, Yue-Qiao; Li, Mu-Qing; Hu, Tianli; Zhang, Hao-Lan; Yin, Xingtian; Que, Wenxiu; Lassoued, Mohamed Saber; Zheng, Yan‐Zhen

doi:10.1039/c9ta04325j

Cited by 95 publications

(116 citation statements)

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“…However, the band gap of Bi‐based perovskites (>1.8 eV) is still far higher than the ideal band gap of solar cells (1.3–1.4 eV), unless toxic Tl 3+ is doped into Cs 2 AgBiBr 6 . In view of these features of lead‐halide‐based perovskites, Bi‐based perovskites materials with 2 D and ideal 3 D metal–halogen frameworks might be more efficient . It is highly preferable to maintain the 3 D perovskite structure by replacing Pb with low‐toxicity metal cations .…”

Section: Introductionmentioning

confidence: 68%

Rigid Amine‐Induced Pseudo‐3 D Lead‐Free Bismuth Halide Perovskite with an Improved Band Edge for Visible‐Light Absorption

Wang

Liu

et al. 2020

ChemSusChem

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Section: Introductionmentioning

confidence: 68%

Rigid Amine‐Induced Pseudo‐3 D Lead‐Free Bismuth Halide Perovskite with an Improved Band Edge for Visible‐Light Absorption

Wang

Liu

et al. 2020

ChemSusChem

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“…This result showed that 2D halide double perovskites could be optically activated by increasing the pressure. In another approach, two new 2D double perovskites (C6H16N2)2AgBiI8•H2O and (C6H16N2)2CuBiI8•0.5H2O were synthesized [88]. These perovskites had bandgaps of 1.93 eV and 1.68 eV, respectively.…”

Section: D Halide Double Perovskitesmentioning

confidence: 99%

“…Recently, seven new double perovskites, namely, PA4AgInCl8, PA4AgBiBr8, and PA4AgInBr8,where PA stands for propyl-ammonium, and OCA4AgBiBr8, BDA2AgBiBr8, PA2CsAgBiBr7, and PA2CsAgIn0.5Bi0.5Br7, where OCA stands for octyl-ammonium and BDA for 1,4butanediammonium, have been synthesized and characterized, as shown in Figure 18 [83]. In another approach, two new 2D double perovskites (C6H16N2)2AgBiI8•H2O and (C6H16N2)2CuBiI8•0.5H2O were synthesized [88]. These perovskites had bandgaps of 1.93 eV and 1.68 eV, respectively.…”

Section: D Halide Double Perovskitesmentioning

confidence: 99%

“…Crystal structure of (a) (C6H16N2)2AgBiI8•H2O and (b) (C6H16N2)2CuBiI8•0.5H2O. Reproduced with permission from[88].…”

mentioning

confidence: 99%

“…(b) Structural alignment of (BA) 2 CsAgBiBr 7 and octahedra of BA. Reproduced with permission from[86].In another approach, two new 2D double perovskites (C 6 H 16 N 2 ) 2 AgBiI 8 •H 2 O and (C 6 H 16 N 2 ) 2 CuBiI 8 • 0.5 H 2 O were synthesized[88]. These perovskites had bandgaps of 1.93 eV and 1.68 eV, respectively.…”

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confidence: 99%

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Recent Advancements in Crystalline Pb-Free Halide Double Perovskites

Usman

Yan

2020

Crystals

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Lead halide perovskites have gained more and more attention because of their ease of synthesis and excellent photoelectric properties including a large absorption coefficient, long carrier lifetime, long carrier diffusion length, and high carrier mobility. However, their toxicity, instability, and phase degradation in ambient environments impede their large-scale applications. To address these concerns, it is desirable to find stable alternative halide perovskites without toxicity and with comparable optoelectronic properties to lead-based perovskites. Over the years, a considerable number of lead-free halide perovskites have been added to this family of materials, including A2B’B’’X6, A2BX6, and A3B2X9 type perovskites. Among these, double perovskites with the general formula A2B’B’’X6 are deemed to be a potential alternative to lead halide perovskites as they possess good stability under ambient conditions and excellent optoelectronic properties. In this review, recent progress in exploring Pb-free halide double perovskites is highlighted. The synthesis, composition-tuning, physical properties, and applications of representative 3D, 2D, and nanocrystal A2B’B’’X6 double perovskites are introduced. In addition, perspectives about current challenges and solutions in this field are also provided.

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Discovery of a 2D Hybrid Silver/Antimony‐Based Iodide Double Perovskite Photoferroelectric with Photostrictive Effect and Efficient X‐Ray Response

Wang

et al. 2022

Adv Funct Materials

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2D hybrid halide double perovskites (HHDPs) have been demonstrated to be a promising alternative to conventional lead-based halide perovskites as a new system of photoferroelectrics, due to their unique characteristics of environmental friendliness, favorable stability, and fascinating optoelectronic properties. Herein, for the first time, a 2D iodide double perovskite photoferroelectric is reported based on Ag/Sb ions, (4,4-DFPD) 4 AgSbI 8 (4,4-DFPD = 4,4-difluoropiperidinium), which possesses a high Curie temperature of 414 K (above BaTiO 3 ), a large spontaneous polarization of 9.6 µC cm −2 , ferroelectric photovoltaic effect, and photostrictive effect. Notably, to the best of the authors' knowledge, the discovery of photostriction in HHDP photoferroelectrics is unprecedented. Moreover, (4,4-DFPD) 4 AgSbI 8 exhibits an impressive X-ray responsivity, with a sensitivity as high as 704.8 µC Gy air −1 cm −2 at 100 V bias and a detection limit as low as 0.36 µGy air s −1 at 10 V bias, both of which outperform the current all HHDP photoferroelectrics. This work enriches the photoferroelectric family, and proves that Ag/Sb-based HHDP photoferroelectrics are a promising candidate for the next-generation optoelectronic devices.

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Two-dimensional lead-free iodide-based hybrid double perovskites: crystal growth, thin-film preparation and photocurrent responses

Abstract: Herein, lead-free layered iodide double perovskites (C6H16N2)2MBiI8 (M = Ag/Cu) were synthesized, which showed typical semiconducting properties and obvious photocurrent response.

Cited by 95 publications

References 33 publications

Rigid Amine‐Induced Pseudo‐3 D Lead‐Free Bismuth Halide Perovskite with an Improved Band Edge for Visible‐Light Absorption

Rigid Amine‐Induced Pseudo‐3 D Lead‐Free Bismuth Halide Perovskite with an Improved Band Edge for Visible‐Light Absorption

Recent Advancements in Crystalline Pb-Free Halide Double Perovskites

Discovery of a 2D Hybrid Silver/Antimony‐Based Iodide Double Perovskite Photoferroelectric with Photostrictive Effect and Efficient X‐Ray Response

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