School of Materials Science Engineering and KIST-UNIST Ulsan center for Convergent Materials/Low Dimensional Carbon Center/Perovtronics Research Center, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 44919, Republic of Korea.
School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 44919, Republic of Korea.
Sci Rep. 2018 Jan 18;8(1):1070. doi: 10.1038/s41598-018-19612-7.
The beneficial use of a hole transport layer (HTL) as a substitution for poly(3,4-ethlyenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) is regarded as one of the most important approaches for improving the stability and efficiency of inverted perovskite solar cells. Here, we demonstrate highly efficient and stable inverted perovskite solar cells by applying a GO-doped PEDOT:PSS (PEDOT:GO) film as an HTL. The high performance of this solar cell stems from the excellent optical and electrical properties of the PEDOT:GO film, including a higher electrical conductivity, a higher work function related to the reduced contact barrier between the perovskite layer and the PEDOT:GO layer, enhanced crystallinity of the perovskite crystal, and suppressed leakage current. Moreover, the device with the PEDOT:GO layer showed excellent long-term stability in ambient air conditions. Thus, the enhancement in the efficiency and the excellent stability of inverted perovskite solar cells are promising for the eventual commercialization of perovskite optoelectronic devices.
将氧化石墨烯（GO）掺杂的聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:GO）薄膜用作空穴传输层（HTL）来替代聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS），被认为是提高倒置钙钛矿太阳能电池稳定性和效率的最重要方法之一。在这里，我们通过应用 GO 掺杂的 PEDOT:PSS（PEDOT:GO）薄膜作为 HTL 来演示高效稳定的倒置钙钛矿太阳能电池。该太阳能电池具有优异的性能，源于 PEDOT:GO 薄膜的卓越的光学和电学性能，包括更高的电导率、与钙钛矿层和 PEDOT:GO 层之间的接触势垒降低相关的更高的功函数、增强的钙钛矿晶体的结晶度和抑制的漏电流。此外，具有 PEDOT:GO 层的器件在环境空气条件下表现出优异的长期稳定性。因此，倒置钙钛矿太阳能电池的效率提高和出色的稳定性有望最终实现钙钛矿光电设备的商业化。
