Chlorine retention enables the indoor light harvesting of triple halide wide bandgap perovskites
Chlorine retention enables the indoor light harvesting of triple halide wide bandgap perovskites
复制标题
氯保留使三卤化物宽带隙钙钛矿的室内光收集成为可能
DOI：
10.1039/d3ta01784b
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发表时间：
2023
影响因子：
11.9
通讯作者：
Wang S
中科院分区：
文献类型：
--
作者：
Wang S
由于物联网的不断发展，室内光伏受到了极大的关注。本研究报告了三卤化物钙钛矿的快速处理如何使氯的保留以及氯在增强宽带隙三阴离子（TA）钙钛矿CH3NH3PbI2.6Br0.2Cl0.2的室内光收集中的有益作用。利用原位掠射广角x射线散射研究了氯的掺入/逸出动力学，揭示了热退火前10分钟后氯的逸出，并通过波长色散x射线光谱的元素分析证实了这一发现。性能最好的TA钙钛矿室内光伏器件在1000 lux室内照度（0.3 mW cm - 2辐照度）下的稳态功率转换效率（PCE）为25.1%，输出功率密度为~ 75 μW cm - 2。三阴离子合金化方法改善了晶体质量，降低了陷阱态密度，延长了载流子寿命。我们还研究了Spiro-MeOTAD常用的空穴传输层（HTL）在室内光照条件下导致J-V迟滞的不利作用，然后用未掺杂的P3HT替代Spiro-MeOTAD可以有效抑制J-V迟滞。然后，优化后的TA钙钛矿室内光伏电池成功地用于为基于纺织纤维的温度传感器无线供电。本研究的结果展示了一种有效吸收氯的新途径，并最大限度地提高了卤化物钙钛矿室内光伏设备的稳态功率输出，以及它们在物联网行业的巨大潜力。
Indoor photovoltaics are receiving tremendous attention due to the continuous development of the Internet of Things. The present study reports how the fast processing of the triple halide perovskite enables the retention of chlorine and the beneficial role of chlorine in enhancing the indoor light harvesting of a wide bandgap triple anion (TA) perovskite CH3NH3PbI2.6Br0.2Cl0.2. The kinetics of chlorine incorporation/escape investigated by in situ grazing incidence wide-angle X-ray scattering revealed the escape of chlorine after the first ten minutes of thermal annealing and the findings were corroborated with elemental analysis by wavelength dispersive X-ray spectroscopy. The best-performing TA perovskite indoor-photovoltaic device achieved a steady-state power conversion efficiency (PCE) of 25.1% with an output power density of ∼75 μW cm−2 under 1000 lux indoor illumination (0.3 mW cm−2 irradiance). Improved crystalline quality, reduced density of trap states and longer carrier lifetime were achieved by the triple anion alloying method. The detrimental role of the commonly used hole transporting layer (HTL) of Spiro-MeOTAD under indoor lighting conditions leading to J–V hysteresis was also investigated, which could then be effectively suppressed by replacing Spiro-MeOTAD with undoped P3HT. The optimized TA perovskite indoor PV cells were then successfully used to wirelessly power a textile fiber-based temperature sensor. The results from the present study demonstrate a novel route to incorporate chlorine effectively and maximize the steady state power output from halide perovskite indoor photovoltaic devices and their promising potential for the IoT industry.