High‐Performance Near‐IR Photodetector Using Low‐Bandgap MA0.5FA0.5Pb0.5Sn0.5I3 Perovskite
Xiaobao Xu,Chu-Chen Chueh,Peifeng Jing,Zhibin Yang,Xueliang Shi,Ting Zhao,Lih Y. Lin,Alex K.-Y. Jen,Alex K.-Y. Jen +8 more
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TLDR
In this article, a high-performance near-IR (NIR) photodetector using a stable low-bandgap Sn-containing perovskite, (CH3NH3)0.5Pb 0.5Sn 0.6I3, which is processed with an antioxidant additive, ascorbic acid (AA).Abstract:
Photodetectors with ultrafast response are explored using inorganic/organic hybrid perovskites. High responsivity and fast optoelectronic response are achieved due to the exceptional semiconducting properties of perovskite materials. However, most of the perovskite-based photodetectors exploited to date are centered on Pb-based perovskites, which only afford spectral response across the visible spectrum. This study demonstrates a high-performance near-IR (NIR) photodetector using a stable low-bandgap Sn-containing perovskite, (CH3NH3)0.5(NH2CHNH2)0.5Pb0.5Sn0.5I3 (MA0.5FA0.5Pb0.5Sn0.5I3), which is processed with an antioxidant additive, ascorbic acid (AA). The addition of AA effectively strengthens the stability of Sn-containing perovskite against oxygen, thereby significantly inhibiting the leakage current. Consequently, the derived photodetector shows high responsivity with a detectivity of over 1012 Jones ranging from 800 to 970 nm. Such low-cost, solution processable NIR photodetectors with high performance show promising potential for future optoelectronic applications.read more
Citations
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Synthetic Approaches for Halide Perovskite Thin Films.
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TL;DR: In this paper, a broadband response perovskite photodetectors (PPDs) with low bandgap (≈1.25 eV) (FASnI3)0.6 MAPbI3 )0.4 perovSKite as active layers, exhibiting broadband response from 300 to 1000 nm.
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