Controlled synthesis and photostability of blue emitting Cs3Bi2Br9 perovskite nanocrystals by employing weak polar solvents at room temperature

Gao, Mingyang; Zhang, Chi; Lian, Linyuan; Guo, Jianwei; Xia, Yong; Peng, Fenglin; Su, Xiaoming; Zhang, Jianbing; Li, Honglang; Zhang, Daoli

doi:10.1039/c9tc00400a

Cited by 52 publications

(43 citation statements)

References 53 publications

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“…Various lead-free perovskite NCs using tin, 27,28 bismuth, [29][30][31][32] and antimony, 33,34 have been investigated. Among them, Bibased perovskite NCs exhibit the potential for stability and environment-friendliness.…”

Section: Introductionmentioning

confidence: 99%

Heating-up synthesis of cesium bismuth bromide perovskite nanocrystals with tailored composition, morphology, and optical properties

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Heating-up synthesis of cesium bismuth bromide perovskite nanocrystals with tailored composition, morphology, and optical properties

et al. 2020

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“…Moreover, the toxicity of lead (Pb) element in the lead perovskite NCs is the bottleneck for the commercial application of perovskite NCs (Chang et al, 2018). Recently, the work of lead-free perovskite NCs, including tin-based (Jellicoe et al, 2016;Wang et al, 2016;Zhang et al, 2016;Wang et al, 2017;Liang et al, 2020) and bismuthbased (Leng et al, 2016(Leng et al, , 2018Yang et al, 2017;Bekenstein et al, 2018;Zhou et al, 2018;Gao et al, 2019) perovskite NCs, has been targeted. Replacing lead with divalent non-toxic metal cations (e.g., tin and bismuth) or heterovalent metal cations (e.g., antimony and silver) has been developed to synthesize leadfree perovskite NCs.…”

Section: Introductionmentioning

confidence: 99%

Energy Down-Conversion Cs3Cu2Cl5 Nanocrystals for Boosting the Efficiency of UV Photodetector

et al. 2021

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Zero-dimension (0-D) lead halide perovskite nanocrystals (NCs) have attracted a sight of interest in the field of optoelectronic devices due to their outstanding properties, such as high photoluminescence quantum yield (PLQY) and size- and composition-controlled tunable emission wavelengths. However, the toxicity of lead (Pb) element in the lead perovskite NCs is the bottleneck for the commercial application of perovskite NCs. Herein, we report a facile ligand-assisted synthesis to achieve lead-free Cs3Cu2Cl5 NCs with a high PLQY of ∼70% and good stability against environmental oxygen/moisture as a promising down-conversion material. It has good merits of high PLQY and large Stokes shift (∼300 nm) originated from the effect of Jahn–Teller distortion and self-trapped excitons (STEs). Furthermore, the Cs3Cu2Cl5 NCs embedded composite films (NCCFs) were utilized to enhance the ultraviolet (UV) response of silicon (Si) photodetectors. External quantum efficiency (EQE) measurements show that the UV response can be greatly improved from 3.3 to 19.9% @ 295 nm based on NCCFs combined with Si photodiodes. Our work offers an effective approach to develop highly efficient and stable lead-free Cs3Cu2Cl5 NCs for the application in the solar-blind UV photodetector.

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“…Notably, Cs 3 Bi 2 Br 9 PNCs were reported to be prepared by a method of weak‐polar solvent at room temperature. [ 89 ] In a typical synthesis, ODE, OA, and OLA were added into a centrifuge tube with vigorously stirring. Then, TBABr‐OA precursor, HBr, and Cs‐Bi‐OA precursor were injected into the tube in sequence.…”

Section: Synthesis Of Lf Pncsmentioning

confidence: 99%

Progresses on Novel B‐Site Perovskite Nanocrystals

Lin

et al. 2021

Advanced Optical Materials

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Halide perovskite materials have emerged as a new type of optoelectronic materials serving as key active layer for next‐generation photovoltaics, light‐emitting diodes, lasers, and photodetectors. Manipulating the crystal size toward the so‐called perovskite nanocrystals (PNCs) will endow new properties due to quantum confinement and ligand effect. However, like their bulk crystalline film, the lead toxicity is still one of decisive concerns that holds‐back their public acceptance. Design of lead‐free (LF) PNCs requires efforts on replacing the B‐site element with other metal candidates from the periodic table. In the past half‐decade, hundreds of new LF PNCs have been developed with various sizes, subdimensionalities, ligands, and electron/quantum confinements, as well as wide applications. Although the lead‐based perovskites still dominate the ongoing research fields, the LF PNCs can have a large potential if novel nonlead B‐site element is introduced to render new type of LF PNCs material that is more stable, less toxic, and more efficient in device performance. In this review, recent progresses on the LF PNCs are revisited to seek these opportunities. The paper is organized in subtopics on material structures, synthesis, properties, and their state‐of‐the‐art applications of different LF PNCs, coupled with an in‐depth discussion on the perspectives and challenges.

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Controlled synthesis and photostability of blue emitting Cs₃Bi₂Br₉ perovskite nanocrystals by employing weak polar solvents at room temperature

Abstract: All inorganic Cs3Bi2Br9 perovskite NCs were synthesized at room temperature, demonstrating blue dual-emission peaks and high photoluminescence quantum yield.

Cited by 52 publications

References 53 publications

Heating-up synthesis of cesium bismuth bromide perovskite nanocrystals with tailored composition, morphology, and optical properties

Heating-up synthesis of cesium bismuth bromide perovskite nanocrystals with tailored composition, morphology, and optical properties

Energy Down-Conversion Cs3Cu2Cl5 Nanocrystals for Boosting the Efficiency of UV Photodetector

Progresses on Novel B‐Site Perovskite Nanocrystals

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