Interface Engineering for Efficient Raindrop Solar Cell

作者：

Lingjie Xie^1,2, Li Yin², Yina Liu^2,*, Hailiang Liu², Bohan Lu², Chun Zhao², Tawfik A. Khattab³, Zhen Wen^1,* and Xuhui Sun^1,*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University 215123, China.

²Department of Applied Mathematics, School of Science, Xi'an Jiaotong-Liverpool University, Suzhou 215123, China.

³Dyeing, Printing and Auxiliaries Department, Textile Industries Research Division, National Research Centre, 12622 Cairo, Egypt.

摘要：

A raindrop solar cell can work either in rainy days to collect mechanical energy of the raindrops or in sunny days to harvest solar energy, which achieves high energy conversion efficiency in various energy environments. However, the low efficiency of raindrop energy harvesting is a dominating barrier to the raindrop solar cells in practical applications. In this work, a MoO₃/top electrode-based triboelectric nanogenerator (MT-TENG) with high rain droplet energy conversion efficiency, integrating with a perovskite solar cell through shared electrodes, has been proposed. The interface electrons between triboelectric layer and electrode can be blocked by MoO₃ layer with high permittivity and wide bandgap, and the MoO₃ based TENG (M-TENG) therefore increases the surface charge density. Thus, the top electrode structure in the solid-liquid interface can greatly increase the output charge by 101.1 times in total. By adjusting the water droplet parameters of the tap water to simulate the actual application scenario, the raindrop output power and mechanical energy conversion efficiency (MCE) can reach 0.68 mW and 12.49%, respectively. In addition, due to the high transmittance of MT-TENG, the perovskite solar cell can still sustain high photovoltaic power conversion efficiency (PCE) of 19.38%. By virtue of the shared electrode circuit design, the raindrop solar cell can continue to purvey electric power on rainy and sunny days, and it only takes about 175 s to charge a 2.2 μF capacitor to 5 V.

影响因子：

15.881

分区情况：

一区

链接：

https://doi.org/10.1021/acsnano.1c10211