<br>用于远程可穿戴健康监测技术的高效稳定自供电混合锡铅钙钛矿光电探测器,Advanced Science

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用于远程可穿戴健康监测技术的高效稳定自供电混合锡铅钙钛矿光电探测器
Advanced Science ( IF 14.3 ) Pub Date : 2022-12-09 , DOI: 10.1002/advs.202205879
Fengcai Liu ₁ , Kai Liu ₁ , Saqib Rafique ₁ , Zengyi Xu ₂ , Wenqing Niu ₂ , Xiaoguo Li ₁ , Yifan Wang ₂ , Liangliang Deng ₁ , Jiao Wang ₁ , Xiaofei Yue ₁ , Tao Li ₃ , Jun Wang ₃ , Paola Ayala ₄ , Chunxiao Cong ₁ , Yajie Qin ₁ , Anran Yu ₁ , Nan Chi ₂ , Yiqiang Zhan _{1,

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Affiliation

在空间站、海洋和预报预警等使用的遥感医疗系统中，实现柔性光电二极管的远程可穿戴健康监测（RWHM）技术是非常理想的，这需要高的外部量子效率（EQE）和近红外区域的探测能力。传统的无机光电探测器 (PD) 机械刚性强且价格昂贵，而广泛报道的溶液处理混合锡铅 (MSP) 钙钛矿光电探测器 (PPD) 在近红外区域中表现出 EQE 和探测率之间的权衡。在此，首次引入了一种新型的功能性钝化抗氧化剂（FPA）策略，通过噻吩-2-碳酰肼（TAH）分子与钙钛矿分子之间的多重相互作用，同时改善结晶、抑制Sn ²⁺氧化并减少MSP钙钛矿薄膜中的缺陷。 MSP 钙钛矿中的阳离子/阴离子。由此产生的溶液处理刚性混合 Sn-Pb PPD 同时实现了高 EQE（840 nm 处为 75.4%）、探测灵敏度（840 nm 处为 1.8 × 10 ¹² Jones）、超快响应时间（ trise / _tfall = 94 ns/97 ns _）），并提高了稳定性。这项工作还重点展示了第一个使用 MSP 钙钛矿和 FPA 策略的柔性光电二极管，具有极高的 EQE（840 nm 处为 75%）和运行稳定性。最重要的是，RWHM 首次在 PIN MSP 钙钛矿光电二极管中实现，用于远程监测人类在休息和跑步后的心率。

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Highly Efficient and Stable Self-Powered Mixed Tin-Lead Perovskite Photodetector Used in Remote Wearable Health Monitoring Technology

Realization of remote wearable health monitoring (RWHM) technology for the flexible photodiodes is highly desirable in remote-sensing healthcare systems used in space stations, oceans, and forecasting warning, which demands high external quantum efficiency (EQE) and detectivity in NIR region. Traditional inorganic photodetectors (PDs) are mechanically rigid and expensive while the widely reported solution-processed mixed tin-lead (MSP) perovskite photodetectors (PPDs) exhibit a trade-off between EQE and detectivity in the NIR region. Herein, a novel functional passivating antioxidant (FPA) strategy has been introduced for the first time to simultaneously improve crystallization, restrain Sn²⁺ oxidization, and reduce defects in MSP perovskite films by multiple interactions between thiophene-2-carbohydrazide (TAH) molecules and cations/anions in MSP perovskite. The resultant solution-processed rigid mixed Sn–Pb PPD simultaneously achieves high EQE (75.4% at 840 nm), detectivity (1.8 × 10¹² Jones at 840 nm), ultrafast response time (t_rise/t_fall = 94 ns/97 ns), and improved stability. This work also highlights the demonstration of the first flexible photodiode using MSP perovskite and FPA strategy with remarkably high EQE (75% at 840 nm), and operational stability. Most importantly, the RWHM is implemented for the first time in the PIN MSP perovskite photodiodes to remotely monitor the heart rate of humans at rest and after-run conditions.

更新日期：2022-12-09

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