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首页> 外文期刊>Optical Materials >Perovskite (PEA)_2Pb(I_(1-x)Br_x)_4 single crystal thin films for improving optoelectronic performances
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Perovskite (PEA)_2Pb(I_(1-x)Br_x)_4 single crystal thin films for improving optoelectronic performances

机译：Perovskite（豌豆）_2pb（i_（1-x）br_x）_4单晶薄膜，用于改善光电性能

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摘要

Single crystal perovskites have become advanced materials in many applications due to their excellent optoelectronic properties and stability. However, bulk single crystal with unsatisfactory thickness would limit its application in flexible optoelectronic devices. Here, large-area two-dimensional perovskite (PEA)2Pb(I1-xBrx)4 (x = 0-1) single crystal thin films (SCTFs) were prepared with a space-confined solution temperature-lowering crystallization method. Through rational control of halide compositions, we succeeded in growing (PEA)2Pb (I1-xBrx)4 SCTFs with x increased from 0 to 1, which achieved band gap fine-tuning from 2.28 to 2.95 eV, corresponding to the edge of the absorption spectrum adjusted from green to blue. Using the excellent (PEA)2Pb(I1xBrx)4 SCTFs properties, a series of photodetectors were designed. The photodetector based on the I-rich composition (x = 0.1) exhibits optimum photosensitivity (Ilight/Idark = 2 x 104) at wavelength of 473 nm (0.52 mW cm-2), while the photodetector based on the Br-rich component (x = 0.8) has the highest Ilight/Idark ratio (-1.6 x 104) under 405 nm (0.52 mW cm-2), showing the selectivity in light detection. At the same time, those devices show extremely low dark current, high specific detectivity (-1013 Jones) and excellent stability.
机译：由于它们出色的光电性能和稳定性，单晶钙耐力在许多应用中成为先进的材料。然而，散装单晶具有不令人满意的厚度将限制其在柔性光电器件中的应用。这里，使用空间限制溶液温度降低结晶方法制备大面积二维钙钛矿（豌豆）2PB（I1-XBRX）4（X = 0-1）单晶薄膜（SCTF）。通过理性控制卤化物组合物，我们成功地增长（豌豆）2PB（I1-XBRX）4 SCTF，X增加到0到1，其达到2.28至2.95eV的带隙微调，对应于吸收的边缘从绿色调整到蓝色的光谱。使用优秀（PEA）2PB（I1xbrx）4 SCTFS属性，设计了一系列光电探测器。基于富含I的组合物（X = 0.1）的光电探测器在波长为473nm（0.52mW cm-2）的温度光敏（Ilight / Idark = 2×104），而光电探测器基于BR富有的组分（ X = 0.8）在405nm（0.52mW cm-2）下具有最高的ILIGHT / IDARK比（-1.6×104），显示光检测中的选择性。同时，这些器件显示出极低的暗电流，高特定探测（-1013琼）和优异的稳定性。

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  • 来源
    《Optical Materials》 |2021年第7期|111074.1-111074.7|共7页
  • 作者

    Zhang Xinyi; Zhao Di; Huo Ziye; Sun Jun; Hu Yufeng; Lou Zhidong; Hou Yanbing; Teng Feng; Cui Qiuhong;

  • 作者单位

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence & Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence & Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence & Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence & Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence & Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence & Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence & Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence & Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence & Opt Informat Beijing 100044 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Single crystal thin film; Br-doping; 2D organic-inorganic perovskite; Selective light detection;

    机译：单晶薄膜;BR-掺杂;2D有机 - 无机钙钛矿;选择性光检测;

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