Hysteresis-Free Lead-Free Double-Perovskite Solar Cells by Interface Engineering

Pantaler, Martina; Cho, Kyung Taek; Queloz, Valentin I. E.; García‐Benito, Inés; Fettkenhauer, Christian; Anusca, Irina; Nazeeruddin, Mohammad Khaja; Lupascu, Doru C.; Grancini, Giulia

doi:10.1021/acsenergylett.8b00871

Cited by 199 publications

(188 citation statements)

References 40 publications

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“…[194] However, only one of the B′ site and B″ site cations has lone-pair states and can be denoted as ''s 0 +s 2 ''. www.advancedsciencenews.com device has been presented by Pantaler et al [195] The origin of this absence of hysteresis is the less trapping/detrapping or ion migration existing in Cs 2 AgBiBr 6 compared with the leadbased hybrid perovskites. As it is, poor optoelectronic properties such as large bandgap with indirect characteristics, reduced electronic dimensionality, and low carrier transport have limited the device performance of the compounds.…”

Section: Applications Of Halide Double Perovskitesmentioning

confidence: 99%

“…e) Wang et al, Reproduced with permission. 2019, 9,1803150 FTO/c-TiO 2 /m-TiO 2 /Cs 2 AgBiBr 6 /PTAA/Au 1.26 - [195] FTO/c-TiO 2 /m-TiO 2 /Cs 2 AgBiBr 6 /SpiroOMeTAD/Au 0.90 - [195] FTO/c-TiO 2 /m-TiO 2 /Cs 2 AgBiBr 6 /PCPDTBT/Au 0.68 - [195] FTO/c-TiO 2 /Cs 2 AgBiBr 6 /P3HT/Au 1.37 - [196] Cs 2 NaBiI 6 FTO/c-TiO 2 /m- www.advancedsciencenews.com stable absorber layers similar to Cs 2 TiBr 6 , the instability seen in CsSnI 3 due to the +2 state of Sn can be eliminated via an oxidative conversion to give Cs 2 SnI 6 with a +4 state Sn. www.advancedsciencenews.com device has been presented by Pantaler et al [195] The origin of this absence of hysteresis is the less trapping/detrapping or ion migration existing in Cs 2 AgBiBr 6 compared with the leadbased hybrid perovskites.…”

Section: Applications Of Halide Double Perovskitesmentioning

confidence: 99%

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Progress of Lead‐Free Halide Double Perovskites

Igbari

Wang

Liao

2019

Advanced Energy Materials

392

305

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Although impressive performance has been obtained, PSCs are still far from commercial or real-life availability due to serious issues such as toxicity [15,16] and poor stability to heat, [17] oxygen, [18] moisture, [19,20] electric field, [21] and light. [18,22] The toxic nature of hybrid organic-inorganic lead halide perovskites has been traced to the presence of Pb in its chemical composition. [15,16,[23][24][25] Pb 2+ readily dissolves in water (e.g., rain water) to form a toxic solution capable of causing serious environmental pollution, harmful to human beings and the ecosystem. Besides their sensitivity to moisture, oxygen, light, electric field, or thermal stress, an existing self-degradation pathway [26,27] is also a big issue in hybrid organic-inorganic lead halide perovskites. Mixed-halide and mixed-cation perovskites have been investigated to address these issues. [28][29][30][31][32] The group IV elements, tin (Sn) [23,[33][34][35] and germanium (Ge), [34,36] have been employed as the replacements for Pb. However, the device performance through this approach has fallen short of the Pb-based ones. For example, the PCEs reported for Sn-based perovskite solar cells are usually less than 10%. [23,[33][34][35][37][38][39][40] In addition, the easy oxidation of Sn and Ge from the +2 state to the +4 state due to their high energy 5s and 4s orbitals makes them less promising for application in stable and long-term PSCs. [41] High throughput calculations also demonstrate that these substitutions are likely to compromise the ideal optoelectronic properties of MAPbI 3 . [42,43] Furthermore, low dimensional (e.g., 2D, 1D, and 0D) perovskites have also been used to address the stability issues in PSCs. [44][45][46][47][48] Recently, a stabilized PCE of 21.7% resulting from a 2D/3D bilayer PSC was reported. [49] However, the highest certified PCE in a 2D-only planar PSC is 15.3%, [50] which is far below that of their 3D perovskite-based counterparts. It thus stimulates the interest to develop new classes of materials which can solve the issues of toxicity and stability while still maintaining the fascinating properties of lead-based perovskite materials.Recent theoretical calculations demonstrate that a halide double perovskite structure, A 2 B′B″X 6 , which could be formed through a replacement of two toxic Pb 2+ in the crystal lattice with a pair of nontoxic heterovalent (i.e., monovalent and trivalent) metal cations, is a promising alternative to realize high-performance, lead-free, and stable PSCs. [51,52] Although, spectroscopic limited maximum efficiency (SLME) calculations revealed an efficiency limit less than 8% for the most prominent member www.advancedsciencenews.com double perovskites with a vacancy ordered structure. [88] In particular, the unit cell axis of Cs 2 AgBiBr 6 is given to be ≈11.25 Å, [25] which is two times larger than that of MAPbBr 3 (≈5.92 Å). [89] Both Ag + and Bi 3+ occupy the B-site of the crystal lattice with slightly varied metal-halide bond lengths. The dissimilar bond lengths st...

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Section: Applications Of Halide Double Perovskitesmentioning

confidence: 99%

Section: Applications Of Halide Double Perovskitesmentioning

confidence: 99%

Progress of Lead‐Free Halide Double Perovskites

Igbari

Wang

Liao

2019

Advanced Energy Materials

392

305

View full text Add to dashboard Cite

show abstract

“…As shown in Figure c, the integrated current density according to external quantum efficiency (EQE) is 1.73 mA cm −2 which matches well with J SC of 1.79 mA cm −2 . Besides, we have summarized the photovoltaic performance of Cs 2 AgBiBr 6 double PSCs (Table S2, Supporting Information) from other reports and our vapor‐deposited devices show comparable PCE with solution‐processed ones.…”

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confidence: 92%

High‐Quality Sequential‐Vapor‐Deposited Cs₂AgBiBr₆ Thin Films for Lead‐Free Perovskite Solar Cells

et al. 2018

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Lead‐free double perovskites have been demonstrated as promising alternatives to solve the toxicity and stability issues in conventional lead trihalide perovskites. However, different solubility of components in the precursors hinders fabrication of double perovskite films with commonly used solution procedures. Here, for the first time, the authors successfully prepared double perovskite Cs2AgBiBr6 thin films throughout a sequential‐vapor‐deposition procedure. The obtained thin films with pure double perovskite phase show large grain sizes, uniform, and smooth surface properties. In addition, the high‐quality vapor‐deposited Cs2AgBiBr6 films exhibit a photoluminescence (PL) lifetime of 117 ns, indicative of significant potential in photovoltaic applications. The resulting solar cells with planar device structure show an optimized power conversion efficiency of 1.37%, which can be maintained at 90% after 240 h of storage under ambient condition. Our results demonstrate the feasibility of employing vapor deposition technique to fabricate high‐quality double perovskite thin films, which paves the way for further development of various optoelectronic devices based on these promising lead‐free semiconductors.

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“…To date, Cs 2 AgBiBr 6 is most applied in halide double perovskite-based solar cells [96][97][98][99][100]. In 2017, Bein et al [96] fabricated Cs 2 AgBiBr 6 films by a spin-coating method and incorporated them into solar cells for the first time.…”

Section: Solar Cellsmentioning

confidence: 99%

Lead-Free Halide Double Perovskite Materials: A New Superstar Toward Green and Stable Optoelectronic Applications

et al. 2019

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HIGHLIGHTS• Lead-based halide perovskite materials have revealed excellent properties in optoelectronic applications. However, the material stability and the toxicity of lead still hinder their large-scale commercial applications.• Lead-free halide double perovskite materials possess the characteristics of environmental friendliness, exceptional stability and tunable optoelectronic properties.• A limited number of halide double perovskites have been synthesized, and extremely few have been developed for optoelectronic applications. Continuing effort is needed to explore more halide double perovskites and modulate the properties for their further applications.ABSTRACT Lead-based halide perovskites have emerged as excellent semiconductors for a broad range of optoelectronic applications, such as photovoltaics, lighting, lasing and photon detection. However, toxicity of lead and poor stability still represent significant challenges. Fortunately, halide double perovskite materials with formula of A 2 M(I)M(III)X 6 or A 2 M(IV)X 6 could be potentially regarded as the films still manifest low quality for photovoltaic applications. Therefore, we propose that continuing efforts are needed to develop more halide double perovskites, modulate the properties and grow high-quality films, with the aim of opening the wild practical applications.

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Hysteresis-Free Lead-Free Double-Perovskite Solar Cells by Interface Engineering

Cited by 199 publications

References 40 publications

Progress of Lead‐Free Halide Double Perovskites

Progress of Lead‐Free Halide Double Perovskites

High‐Quality Sequential‐Vapor‐Deposited Cs₂AgBiBr₆ Thin Films for Lead‐Free Perovskite Solar Cells

Lead-Free Halide Double Perovskite Materials: A New Superstar Toward Green and Stable Optoelectronic Applications

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Hysteresis-Free Lead-Free Double-Perovskite Solar Cells by Interface Engineering

Cited by 199 publications

References 40 publications

Progress of Lead‐Free Halide Double Perovskites

Progress of Lead‐Free Halide Double Perovskites

High‐Quality Sequential‐Vapor‐Deposited Cs2AgBiBr6 Thin Films for Lead‐Free Perovskite Solar Cells

Lead-Free Halide Double Perovskite Materials: A New Superstar Toward Green and Stable Optoelectronic Applications

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High‐Quality Sequential‐Vapor‐Deposited Cs₂AgBiBr₆ Thin Films for Lead‐Free Perovskite Solar Cells