Jinno Hiroaki, Shivarudraiah Sunil B, Asbjörn Rasmussen, Vagli Gianluca, Marcato Tommaso, Eickemeyer Felix Thomas, Pfeifer Lukas, Yokota Tomoyuki, Someya Takao, Shih Chih-Jen
Institute for Chemical and Bioengineering, ETH, Zurich, Zurich, 8093, Switzerland.
Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, EPFL, Lausanne, 1015, Switzerland.
Adv Mater. 2024 Feb;36(5):e2304604. doi: 10.1002/adma.202304604. Epub 2023 Dec 5.
Self-powered skin optoelectronics fabricated on ultrathin polymer films is emerging as one of the most promising components for the next-generation Internet of Things (IoT) technology. However, a longstanding challenge is the device underperformance owing to the low process temperature of polymer substrates. In addition, broadband electroluminescence (EL) based on organic or polymer semiconductors inevitably suffers from periodic spectral distortion due to Fabry-Pérot (FP) interference upon substrate bending, preventing advanced applications. Here, ultraflexible skin optoelectronics integrating high-performance solar cells and monochromatic light-emitting diodes using solution-processed perovskite semiconductors is presented. n-i-p perovskite solar cells and perovskite nanocrystal light-emitting diodes (PNC-LEDs), with power-conversion and current efficiencies of 18.2% and 15.2 cd A , respectively, are demonstrated on ultrathin polymer substrates with high thermal stability, which is a record-high efficiency for ultraflexible perovskite solar cell. The narrowband EL with a full width at half-maximum of 23 nm successfully eliminates FP interference, yielding bending-insensitive spectra even under 50% of mechanical compression. Photo-plethysmography using the skin optoelectronic device demonstrates a signal selectivity of 98.2% at 87 bpm pulse. The results presented here pave the way to inexpensive and high-performance ultrathin optoelectronics for self-powered applications such as wearable displays and indoor IoT sensors.
在超薄聚合物薄膜上制备的自供电皮肤光电子器件正成为下一代物联网（IoT）技术中最具前景的组件之一。然而，一个长期存在的挑战是由于聚合物基板的加工温度较低，导致器件性能不佳。此外，基于有机或聚合物半导体的宽带电致发光（EL）在基板弯曲时不可避免地会受到法布里-珀罗（FP）干涉的影响，从而产生周期性光谱失真，这阻碍了其进一步应用。在此，展示了一种集成了高性能太阳能电池和单色发光二极管的超柔性皮肤光电子器件，该器件使用溶液处理的钙钛矿半导体。在具有高热稳定性的超薄聚合物基板上展示了n-i-p钙钛矿太阳能电池和钙钛矿纳米晶体发光二极管（PNC-LED），其功率转换效率和电流效率分别为18.2%和15.2 cd A，这是超柔性钙钛矿太阳能电池的创纪录高效率。半高宽为23 nm的窄带EL成功消除了FP干涉，即使在50%的机械压缩下也能产生对弯曲不敏感的光谱。使用皮肤光电器件进行的光电容积描记术在87 bpm脉搏时显示出98.2%的信号选择性。本文展示的结果为可穿戴显示器和室内物联网传感器等自供电应用的廉价且高性能超薄光电子器件铺平了道路。
