Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
High‐Performance Reticular Porous Perovskite Coating with Wide‐Spectrum Absorption for Photothermal Conversion
Solar RRL ( IF 6.0 ) Pub Date : 2020-12-11 , DOI: 10.1002/solr.202000620 Liuxu Yu 1 , Xiangzhao Zhang 1 , Guiwu Liu 1 , Jian Yang 1 , Wenkui Cao 1 , Junlin Liu 1 , Guanjun Qiao 1
Solar RRL ( IF 6.0 ) Pub Date : 2020-12-11 , DOI: 10.1002/solr.202000620 Liuxu Yu 1 , Xiangzhao Zhang 1 , Guiwu Liu 1 , Jian Yang 1 , Wenkui Cao 1 , Junlin Liu 1 , Guanjun Qiao 1
Affiliation
|
Good thermal shock resistance and high absorptivity in a wide spectral range, as the two key aspects of photothermal coating in high‐temperature applications, are seldom realized simultaneously. Herein, it is reported that a reticular porous Ca‐doped LaCrO3 perovskite photothermal coating fabricated by a simple process presents excellent thermal shock resistance between 1200 °C and room temperature and optical absorptivity of ≈94% in the wavelength range of 0.3–14 μm. The high‐temperature sintering after screen printing triggers significant variations in the microchemistry and microstructure of the Ca‐doped LaCrO3 coatings, and the experimental analyses and the first‐principles calculation demonstrate that the appropriate doping of Ca2+ causes lattice distortion, decreases the lattice parameters and bandgap, and effectively enhances interactions between the photon and carrier, resulting in the high optical absorptivity in the visible, near‐, and mid‐infrared ranges. The reticular porous microstructure and interfacial diffusion bonding between the coating and Al2O3 substrate with a gradient transition layer contribute to the high‐temperature thermal shock resistance. Herein, a novel way to fabricate a high‐performance and low‐cost photothermal conversion coating is provided, which presents a broad application prospect in energy harvesters and sensors.
中文翻译：
高性能网状多孔钙钛矿涂层，具有宽光谱吸收能力，可进行光热转换
作为高温应用中光热涂层的两个关键方面，很少同时实现良好的抗热震性和在宽光谱范围内的高吸收率。在此，据报道，通过简单的工艺制成的网状多孔Ca掺杂的LaCrO 3钙钛矿光热涂层在1200°C和室温之间表现出优异的抗热震性，在0.3–14μm的波长范围内具有约94％的光学吸收率。丝网印刷后的高温烧结触发了Ca掺杂的LaCrO 3涂层的微观化学和微观结构的显着变化，并且实验分析和第一性原理计算表明，Ca 2+的适当掺杂会导致晶格畸变，降低晶格参数和带隙，并有效增强光子与载流子之间的相互作用，从而导致可见光，近红外和中红外范围内的高光学吸收率。涂层与具有梯度过渡层的Al 2 O 3衬底之间的网状多孔微观结构和界面扩散结合有助于提高抗高温冲击性。在此，提供了一种新颖的制造高性能，低成本的光热转换涂层的方法，在能量收集器和传感器中具有广阔的应用前景。
更新日期：2020-12-11
中文翻译：
高性能网状多孔钙钛矿涂层，具有宽光谱吸收能力，可进行光热转换
作为高温应用中光热涂层的两个关键方面，很少同时实现良好的抗热震性和在宽光谱范围内的高吸收率。在此，据报道，通过简单的工艺制成的网状多孔Ca掺杂的LaCrO 3钙钛矿光热涂层在1200°C和室温之间表现出优异的抗热震性，在0.3–14μm的波长范围内具有约94％的光学吸收率。丝网印刷后的高温烧结触发了Ca掺杂的LaCrO 3涂层的微观化学和微观结构的显着变化，并且实验分析和第一性原理计算表明，Ca 2+的适当掺杂会导致晶格畸变，降低晶格参数和带隙，并有效增强光子与载流子之间的相互作用，从而导致可见光，近红外和中红外范围内的高光学吸收率。涂层与具有梯度过渡层的Al 2 O 3衬底之间的网状多孔微观结构和界面扩散结合有助于提高抗高温冲击性。在此，提供了一种新颖的制造高性能，低成本的光热转换涂层的方法，在能量收集器和传感器中具有广阔的应用前景。
京公网安备 11010802027423号