A Direct Bandgap Copper–Antimony Halide Perovskite

Vargas, Brenda Cabral; Ramos, Estrella; Pérez–Gutiérrez, Enrique; Alonso, Juan Carlos; Solis‐Ibarra, Diego

doi:10.1021/jacs.7b04119

Cited by 250 publications

(298 citation statements)

References 27 publications

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“…[83,89,90] Cortecchia et al studied the optoelectronic properties of MA 2 CuCl x Br 4−x hybrid perovskites as light harvesters in solar cells. [91,92] The low dimensional structure as well as the localized nature of split Cu 3d orbitals lead to fairly localized band edges and thus large carrier effective masses. It is seen that because of the +2 oxidation state of Cu, the conduction band is derived from the unoccupied Cu 3d orbitals hybridized with Br/Cl p orbitals.…”

Section: Tm(ii) and Iia(ii) Elementsmentioning

confidence: 99%

From Lead Halide Perovskites to Lead‐Free Metal Halide Perovskites and Perovskite Derivatives

2019

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serious challenges due to the inclusion of toxic Pb and instability against moisture, heat, and irradiation. In recent years, significant efforts have been paid to develop Pb-free halide perovskite and perovskite derivative absorber materials. However, so far, solar cells based on these materials show significantly inferior performances as compared to their Pb halide perovskite counterparts. Herein, we provide reviews on the fundamental understandings of the photovoltaic properties from Pb halide perovskites to Pb-free metal halide perovskites and perovskite derivatives as well as the experimental results reported in the literature. The results suggest that replacing Pb by nontoxic elements may degrade the superior photovoltaic properties seen in Pb halide perovskites, explaining the fact that all reported solar cells based on Pb-free perovskites or perovskite derivatives show performances significantly lower than Pb halide perovskite solar cells. Overview: Approaches and Consequences of Pb ReplacementWe first provide an overview of the approaches and consequences of Pb replacement reported in the literature, as shown in Figure 1. In general, there are two categories for Pb replacement: using either homovalent elements such as Sn and Ge or heterovalent elements such as Bi and Sb. The heterovalent replacement category can be divided into two subcategories based on the ways to maintain the charge neutrality: ion-splitting and ordered vacancy. The ion-splitting subcategory can be further divided into mixed anion compounds with the formula of AB(Ch,X) 3 , where Ch represents a chalcogen element, and X represents a halogen element, and mixed cation compounds with a formula of A 2 B(I)B(III)X 6 , which are commonly called double perovskites. The ordered vacancy subcategory can also be divided into the B(III) compounds with a formula of A 3 ◻B(III)X 9 and the B(IV) compounds with a formula of A 2 ◻ B(IV)X 6 (the sign of ◻ indicates vacancy). Figure 1 also summarizes the photovoltaic properties and the stabilities of each group of materials, which provides a clear overview of the consequences of Pb replacement. While the homovalent replacement by Sn or Ge leads to instability, the heterovalent Pb replacement leads to degraded electronic properties mainly due to the reduction on electronic dimensionality. As a result, all the reported Pb-free perovskite and perovskite derivative solar Despite the exciting progress on power conversion efficiencies, the commercialization of the emerging lead (Pb) halide perovskite solar cell technology still faces significant challenges, one of which is the inclusion of toxic Pb. Searching for Pb-free perovskite solar cell absorbers is currently an attractive research direction. The approaches used for and the consequences of Pb replacement are reviewed herein. Reviews on the theoretical understanding of the electronic, optical, and defect properties of Pb and Pb-free halide perovskites and perovskite derivatives are provided, as well as the experimental results available in the literature....

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Section: Tm(ii) and Iia(ii) Elementsmentioning

confidence: 99%

From Lead Halide Perovskites to Lead‐Free Metal Halide Perovskites and Perovskite Derivatives

2019

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“…Cs 4 CuSb 2 Cl 12 : Aiming for high‐performance lead‐free metal‐halide perovskite, Vargas et al121 incorporated Cu 2+ into α‐Cs 3 Sb 2 Cl 9 and yielded layered perovskite Cs 4 CuSb 2 Cl 12 , which has a direct bandgap of 1.0 eV and better conductivity than that of MAPbI 3 . Additionally, Cs 4 CuSb 2 Cl 12 displayed high thermal‐stability, photostability, and resistance to humidity.…”

Section: Lead‐free Halide Hybrid Perovskite and Related Absorbersmentioning

confidence: 99%

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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“…A postsynthetic anion exchange treatment on the as‐synthesized PNCs allows the tuning of halide compositions, leading to a tunable emission wavelength ranging from 390 to 570 nm (see Figure e). From the fully inorganic halide double PNCs with a proposed structure A 2 BB′X 6 (Figure c‐iii), only Cs 2 AgBiX 6 , Cs 2 AgInX 6 , and Cs 4 CuSbCl 12 have been successfully synthesized to date. However, most of the known double PNCs have a large bandgap of over 2 eV, and thus are not suitable for light harvesting.…”

Section: Optoelectronic Propertiesmentioning

confidence: 99%

Halide Perovskite Nanocrystals for Next‐Generation Optoelectronics

Liu

Zhang

Gedamu

et al. 2019

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Colloidal perovskite nanocrystals (PNCs) combine the outstanding optoelectronic properties of bulk perovskites with strong quantum confinement effects at the nanoscale. Their facile and low‐cost synthesis, together with superior photoluminescence quantum yields and exceptional optical versatility, make PNCs promising candidates for next‐generation optoelectronics. However, this field is still in its early infancy and not yet ready for commercialization due to several open challenges to be addressed, such as toxicity and stability. Here, the key synthesis strategies and the tunable optical properties of PNCs are discussed. The photophysical underpinnings of PNCs, in correlation with recent developments of PNC‐based optoelectronic devices, are especially highlighted. The final goal is to outline a theoretical scaffold for the design of high‐performance devices that can at the same time address the commercialization challenges of PNC‐based technology.

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A Direct Bandgap Copper–Antimony Halide Perovskite

Cited by 250 publications

References 27 publications

From Lead Halide Perovskites to Lead‐Free Metal Halide Perovskites and Perovskite Derivatives

From Lead Halide Perovskites to Lead‐Free Metal Halide Perovskites and Perovskite Derivatives

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

Halide Perovskite Nanocrystals for Next‐Generation Optoelectronics

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