Synthesis of large two-dimensional lead-free bismuth–silver double perovskite microplatelets and their application for field-effect transistors

Abstract

Two-dimensional double perovskite (PEA)4BiAgX8 microplatelets are synthesized for the first time with application in field-effect transistors.

2D/3D Hybrid Cs2AgBiBr6 Double Perovskite Solar Cells: Improved Energy Level Alignment for Higher Contact‐Selectivity and Large Open Circuit Voltage

“…After the formation of the 3D film, we introduced the spacer cation by spincoating phenethyl ammonium bromide (PEABr) on top, which is well known to form a 2D silver‐bismuth perovskite phase. [ 47–49 ] We tested the hybrid perovskite formation with different PEABr concentrations in 2‐propanol ( iso propanol, IPA) ranging from 0.01 mol L –1 (0.01 m ) to 0.1 m .…”

Switched‐On: Progress, Challenges, and Opportunities in Metal Halide Perovskite Transistors

“…[135] Other stoichiometries studied include 2D perovskite PEA 4 BiAgBr 8 , for which microplatelets were incorporated in p-type transistors with mobilities of μ h = 1.66 × 10 -5 cm 2 V -1 s -1 in air. [136] In summary, after more than a decade gap in the research on 2D perovskite FETs, the recent revival of interest has generated remarkable progress: both n-type and p-type transistors have been fabricated and characterized based on polycrystalline films and single crystals with various contacts and [17]. Reprinted with permission from AAAS.…”

“…[ 135 ] Other stoichiometries studied include 2D perovskite PEA 4 BiAgBr 8 , for which microplatelets were incorporated in p‐type transistors with mobilities of μ h = 1.66 × 10 –5 cm 2 V –1 s –1 in air. [ 136 ]…”

“…In addition, with the increase in mobility, the channel resistance decreases, and hence the contacts become even more relevant. [ 39 ] Examining all manuscripts discussed in Tables 1 and 2, we found that the shortest channel length reported in perovskite FETs was L = 2 µm, [ 136 ] with the vast majority focusing on L > 30 µm. This is at least one order of magnitude larger than the dimension needed for MHz operation given the current state of the art in terms of mobility.…”

Lead‐Free Halide Double Perovskite Nanocrystals for Light‐Emitting Applications: Strategies for Boosting Efficiency and Stability

“…Lead‐free HDP nanocrystals have been documented wide application prospects in solar cells, [ 53–57 ] LEDs, [ 58 ] photocatalysis, [ 59,60 ] photodetectors, [ 61 ] and many other optoelectronic fields. [ 62,63 ] Although Sn 4+ ‐based, [ 64–67 ] Zr 4+ ‐based, [ 68 ] Na + /Bi 3+ ‐based, [ 69,70 ] Na + /In 3+ ‐based, [ 71 ] K + /In 3+ ‐based, [ 71 ] Ag + /In 3+ ‐based, [ 72–77 ] and Mn 2+ /Bi 3+ ‐based, [ 78,79 ] lead‐free HDP bulk materials with highly efficient emission ( Table 1 ) have been designed and synthesized in recent years, the photoluminescent (PL) properties of colloidal HDP nanocrystals still remain enormous challenge for application in LED devices compared with lead halide perovskite nanocrystals. The main reasons for poor PL performance of colloidal HDP nanocrystals can be ascribed to their intrinsic and surface defects, indirect band gaps, and forbidden transitions.…”