Formation of 2D-Layered (CH3NH3)3Sb2I9 Lead-Free Perovskite Phase from CH3NH3I and SbSI: Photodetection Activity in Carbon Based Lateral Devices
Journal of Electronic Materials(2021)
摘要
The reaction between methylammonium iodide (
$${\text{MAI}}$$
$$({\text{MA}} = {\text{CH}}_{3} {\text{NH}}_{3}^{ + } )$$
) and antimony sulfoiodide (
$${\text{SbSI}}$$
) in reflux conditions results in the formation of a 2D-layered perovskite phase, methylammonium antimony iodide (
$${\text{MA}}_{3} {\text{Sb}}_{2} I_{9}$$
). X-ray diffraction
$$\left( {{\text{XRD}}} \right)$$
and
$${\text{UV}} - {\text{Vis}}$$
spectroscopy confirm that in reflux conditions, the reaction between
$${\text{MAI}}$$
and
$${\text{SbSI}}$$
in a 2:7 molar ratio (MR(2:7)) obtains the
$$2D$$
-layered
$${\text{MA}}_{3} {\text{Sb}}_{2} I_{9}$$
lead-free perovskite phase as the main product. The MR(2:7)
$${\text{~MAI}}$$
-
$${\text{SbSI}}$$
reaction product in a carbon matrix in lateral electrode configuration exhibits a relatively high difference between light and dark current
$$\left( {I_{{{\text{light}}}} - I_{{{\text{dark}}}} } \right)$$
of ~ 55 µA at 1 V applied bias voltage. The better photoresponse for the MR(2:7)
$${\text{MAI}}$$
-
$${\text{SbSI}}$$
reaction product in the presented device configuration indicates that the lead-free 2D-layered perovskite structure (
$${\text{MA}}_{3} {\text{Sb}}_{2} I_{9}$$
) found assistance from the carbon materials for improved photogenerated charge carrier harvesting.
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关键词
Lead-free perovskite,methylammonium antimony sulfur diiodide,imidazolium antimony iodide,methylammonium antimony iodide,antimony sulfoiodide,antimony sulfide,carbon,lateral device
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