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Influence of the rate of radiation energy on the charge-carrier kinetics application of all-inorganic CsPbBr3 perovskite nanocrystals
RSC Advances ( IF 3.9 ) Pub Date : 2020-9-24 , DOI: 10.1039/d0ra05766e Virendra Kumar 1 , Vandana Nagal 2 , Rahul Kumar 1 , Shubhda Srivastava 3, 4 , Bipin Kumar Gupta 4 , Mahesh Kumar 4 , Aurangzeb Khurram Hafiz 2 , Kedar Singh 1
RSC Advances ( IF 3.9 ) Pub Date : 2020-9-24 , DOI: 10.1039/d0ra05766e Virendra Kumar 1 , Vandana Nagal 2 , Rahul Kumar 1 , Shubhda Srivastava 3, 4 , Bipin Kumar Gupta 4 , Mahesh Kumar 4 , Aurangzeb Khurram Hafiz 2 , Kedar Singh 1
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In the field of optoelectronics, all-inorganic CsPbBr3 perovskite nanocrystals (PNCs) have gained significant interest on account of their superb processability and ultra-high stability among all the counterparts. In this study, we conducted an in-depth analysis of CsPbBr3 PNCs using joint transient optical spectroscopies (time-resolved photoluminescence and ultrafast transient absorption) in a very comprehensive manner. In order to understand the in-depth analysis of excited-state kinetics, the transient absorption spectroscopy has been performed. The structure of interest of CsPbBr3 PNCs was subjected to the rates of the radiation energy of 0.10 mW (κr/κnr = ∼0.62) and 0.30 mW (κr/κnr = ∼0.64). With the rate of radiation energy 0.30 mW, it was observed that there was a significant increase in hot carrier relaxation together with high radiative recombination, resulting in a decrease in charge trappings. Herein, we demonstrate that the tuning of the rate of radiation energies helps to understand the charge-carrier kinetics of CsPbBr3 PNCs, which would thus improve the manufacturing of efficient photovoltaic devices.
中文翻译：
辐射能量速率对全无机CsPbBr3钙钛矿纳米晶载流子动力学应用的影响
在光电子领域，全无机CsPbBr 3钙钛矿纳米晶体（PNCs）因其卓越的加工性能和超高稳定性而引起了广泛关注。在这项研究中，我们使用联合瞬态光学光谱（时间分辨光致发光和超快瞬态吸收）以非常全面的方式对 CsPbBr 3 PNC 进行了深入分析。为了理解激发态动力学的深入分析，已经进行了瞬态吸收光谱。CsPbBr 3 PNCs 感兴趣的结构受到 0.10 mW ( κr / κ nr = ∼0.62 ) 和 0.30 mW (κ r / κ nr = ∼0.64)。在辐射能量率为 0.30 mW 的情况下，观察到热载流子弛豫显着增加以及高辐射复合，导致电荷俘获减少。在此，我们证明了辐射能量速率的调整有助于了解 CsPbBr 3 PNC 的电荷载流子动力学，从而改进高效光伏器件的制造。
更新日期：2020-09-24
中文翻译：
辐射能量速率对全无机CsPbBr3钙钛矿纳米晶载流子动力学应用的影响
在光电子领域，全无机CsPbBr 3钙钛矿纳米晶体（PNCs）因其卓越的加工性能和超高稳定性而引起了广泛关注。在这项研究中，我们使用联合瞬态光学光谱（时间分辨光致发光和超快瞬态吸收）以非常全面的方式对 CsPbBr 3 PNC 进行了深入分析。为了理解激发态动力学的深入分析，已经进行了瞬态吸收光谱。CsPbBr 3 PNCs 感兴趣的结构受到 0.10 mW ( κr / κ nr = ∼0.62 ) 和 0.30 mW (κ r / κ nr = ∼0.64)。在辐射能量率为 0.30 mW 的情况下，观察到热载流子弛豫显着增加以及高辐射复合，导致电荷俘获减少。在此，我们证明了辐射能量速率的调整有助于了解 CsPbBr 3 PNC 的电荷载流子动力学，从而改进高效光伏器件的制造。
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