UP-CONVERSION BOOSTED ALL-INORGANIC CSPBBR3 PEROVSKITE SOLAR CELL**
Perovskite solar cells (PSCs) have demonstrated high photovoltaic performance (mainly concentrated in the visible regions) but poor utilization of infrared regions (IR). However, 50% of solar irradiation lies in the infrared (IR) and ultraviolet (UV) portions, which greatly limits the light harvesting efficiency for the PSCs, thus affecting the power conversion efficiency (PCE). In particular, all-inorganic CSPbBr3 has become the most reported perovskite because of its relatively long-term stability. However, the realization of longer operating time of all-inorganic CSPbBr3 is at the cost of more light loss because the bandgap of CSPbBr3 becomes wider. In order to escalate the PCE of PSCS, Lanthanide series with a broad band absorption in IR regions, particularly, Er-complex will be attempted to dope CSPbBr3 for up-converting IR light into visible one for higher photocurrent efficiency, meanwhile, maintaining the long term stability of the device. Various properties of Er-doped CsPbBr3, like optical, electric, crystal structure, morphology and so on, will be thoroughly investigated. Er-doped CSPbBr3 as a light absorbing layer will be assembled into a planar p-i-n junction solar cells, along with carbon nanotubes (CNTs) as a p-layer for hole transporting and TiO2 as a n-layer for electron transporting. Controlled solar cells merely with CSPbBr3 as the light absorbing layer with TiO2 and CNTS will be constructed as well for comparison. The short circuit current I and open circuit voltage V will be measured by the I-V curve in order to evaluate the performance of both solar cells. Solar cells with Er-doped CSPbBr3 would outperform the controlled one by the higher photovoltaic performance.
Nnyamah, Christine C; Hurst, Tyler; and Zheng, Liqiu
"UP-CONVERSION BOOSTED ALL-INORGANIC CSPBBR3 PEROVSKITE SOLAR CELL**,"
Georgia Journal of Science, Vol. 77, No. 1, Article 131.
Available at: https://digitalcommons.gaacademy.org/gjs/vol77/iss1/131