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Deterministic Nucleation for Halide Perovskite Thin Films with Large and Uniform Grains

机译：大而均匀晶粒的卤化物钙钛矿薄膜的确定性成核

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摘要

Halide perovskite materials have come to the forefront of optoelectronics recently owing to their excellent light absorbing and emitting properties. Despite their excellent properties there are still problems that need to be overcome such as short operating lifetimes, and an observed hysteresis behavior in their current-voltage characteristics. It is found that these challenges could be overcome by developing a deterministic nucleation process using gold as a nucleation promoter to control the grain size of the perovskite layer. It is shown that this deterministic nucleation process can be expanded across multiple perovskite systems and can be used to achieve extremely uniform and large grain sizes within the perovskite layer. These large perovskite grains exhibit enhanced stability compared to current state-of-the-art nanocrystalline films, and exhibit no hysteresis in their I-V characteristics which is key if commercialization of perovskites is to be realized.
机译：卤化物钙钛矿材料由于其出色的吸光和发射性能，最近已成为光电领域的前沿。尽管它们具有出色的性能，但仍然需要克服一些问题，例如使用寿命短以及在电流-电压特性中观察到的滞后行为。已经发现，通过开发使用金作为成核促进剂来控制钙钛矿层的晶粒尺寸的确定性成核过程可以克服这些挑战。结果表明，这种确定性的成核过程可以扩展到多个钙钛矿体系中，并且可以用于在钙钛矿层内实现极其均匀且大的晶粒尺寸。与目前的最新纳米晶体薄膜相比，这些较大的钙钛矿颗粒表现出增强的稳定性，并且在其I-V特性方面没有表现出滞后性，这对于要实现钙钛矿的商业化至关重要。

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  • 来源
    《Advanced Functional Materials》 |2017年第40期|1702180.1-1702180.9|共9页
  • 作者

    Geske Thomas; Li Junqiang; Worden Matthew; Shan Xin; Chen Mingming; Bade Sri Ganesh R.; Yu Zhibin;

  • 作者单位

    Florida State Univ, FAMU FSU Coll Engn, High Performance Mat Inst, Dept Ind & Mfg Engn, Tallahassee, FL 32310 USA|Florida State Univ, Mat Sci & Engn, Tallahassee, FL 32306 USA;

    Florida State Univ, FAMU FSU Coll Engn, High Performance Mat Inst, Dept Ind & Mfg Engn, Tallahassee, FL 32310 USA;

    Florida State Univ, FAMU FSU Coll Engn, High Performance Mat Inst, Dept Ind & Mfg Engn, Tallahassee, FL 32310 USA;

    Florida State Univ, FAMU FSU Coll Engn, High Performance Mat Inst, Dept Ind & Mfg Engn, Tallahassee, FL 32310 USA;

    Florida State Univ, FAMU FSU Coll Engn, High Performance Mat Inst, Dept Ind & Mfg Engn, Tallahassee, FL 32310 USA;

    Florida State Univ, FAMU FSU Coll Engn, High Performance Mat Inst, Dept Ind & Mfg Engn, Tallahassee, FL 32310 USA;

    Florida State Univ, FAMU FSU Coll Engn, High Performance Mat Inst, Dept Ind & Mfg Engn, Tallahassee, FL 32310 USA|Florida State Univ, Mat Sci & Engn, Tallahassee, FL 32306 USA;

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  • 正文语种 eng
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  • 关键词

    halide perovskites; hysteresis; large grain; nucleations; stability;

    机译：卤化物钙钛矿;磁滞;大晶粒;形核;稳定性;

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