Photosensitisation of inkjet printed graphene with stable all-inorganic perovskite nanocrystals.
Photosensitisation of inkjet printed graphene with stable all-inorganic perovskite nanocrystals.
复制标题
喷墨印刷石墨烯与稳定的全无机钙钛矿纳米晶体的光敏化。
DOI：
10.1039/d2nr06429d
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发表时间：
2023
期刊：
影响因子：
6.7
通讯作者：
Austin JS
中科院分区：
文献类型：
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作者：
Austin JS
具有增强的环境稳定性的全无机钙钛矿纳米晶体（NC）对于光电应用特别感兴趣。在这里，我们报告了用于喷墨沉积的CsPbX 3（X是Br或I）油墨的配方，并利用这些NC作为石墨烯光电探测器中的光敏层，包括基于单层石墨烯（SLG）的那些以及喷墨印刷的石墨烯（iGr）设备。这些光电探测器的性能在很大程度上取决于器件的结构、几何形状和制造工艺。我们实现了高的光响应性，在可见光波长范围内R > 106 A W−1，以及由钙钛矿NC油墨的卤化物含量控制的光谱响应。通过利用钙钛矿NCs，iGr和金纳米粒子墨水，我们展示了一个完全喷墨打印的光电探测器，其R = 20 A W−1，这是迄今为止报道的此类器件的最高值。钙钛矿/石墨烯光电探测器的性能通过光生载流子从钙钛矿NC转移到石墨烯和通过iGr网络的电荷传输来解释。这里开发的钙钛矿墨水能够实现稳定和灵敏的石墨烯基光子探测器。喷墨沉积与传统Si技术和柔性衬底的兼容性结合喷墨沉积提供的高度设计自由度，为从电子到环境科学的应用提供了部分和完全印刷的光电器件的机会。
All-inorganic perovskite nanocrystals (NCs) with enhanced environmental stability are of particular interest for optoelectronic applications. Here we report on the formulation of CsPbX3 (X is Br or I) inks for inkjet deposition and utilise these NCs as photosensitive layers in graphene photodetectors, including those based on single layer graphene (SLG) as well as inkjet-printed graphene (iGr) devices. The performance of these photodetectors strongly depends on the device structure, geometry and the fabrication process. We achieve a high photoresponsivity, R > 106 A W−1 in the visible wavelength range and a spectral response controlled by the halide content of the perovskite NC ink. By utilising perovskite NCs, iGr and gold nanoparticle inks, we demonstrate a fully inkjet-printed photodetector with R ≈ 20 A W−1, which is the highest value reported to date for this type of device. The performance of the perovskite/graphene photodetectors is explained by transfer of photo-generated charge carriers from the perovskite NCs into graphene and charge transport through the iGr network. The perovskite ink developed here enabled realisation of stable and sensitive graphene-based photon detectors. Compatibility of inkjet deposition with conventional Si-technologies and with flexible substrates combined with high degree of design freedom provided by inkjet deposition offers opportunities for partially and fully printed optoelectronic devices for applications ranging from electronics to environmental sciences.