Snaith group

Abstract:

Data and figures generated for the manuscript 'Chloride-based additive engineering for efficient and stable wide-bandgap perovskite solar cells'.

Abstract:

Raw data for 'Effects of Bi and Sb ion incorporation on the optoelectronic properties of mixed lead-tin perovskites'.

Authors: F. M. Rombach, L. Gregori, A. Sidler, J. Whitworth, S. Zeiske, H. Jin, E. Hung, S. Motti, P. Caprioglio, A. Ardalan, M. Lenz, D. Meggiolaro, F. De Angelis, H. J. Snaith

Abstract:

The limited conductivity of existing transparent conducting oxide (TCO) greatly restricts the further performance improvement of perovskite solar cells (PSCs), especially for large-area devices. Herein, buried-metal-grid tin-doped indium oxide (BMG ITO) electrodes are developed to minimize the power loss caused by the undesirable high sheet resistance of TCOs. By burying 140-nm-thick metal grids into ITO using a photolithography technique, the sheet resistance of ITO is reduced from 15.0 to 2.7 Ω sq^-1 . The metal step of BMG over ITO has a huge impact on the charge carrier transport in PSCs. The PSCs using BMG ITO with a low metal step deliver power conversion efficiencies (PCEs) significantly better than that of their counterparts with higher metal steps. Moreover, compared with the pristine ITO-based PSCs, the BMG ITO-based PSCs show a smaller PCE decrease when scaling up the active area of devices. The parallel-connected large-area PSCs with an active area of 102.8 mm² reach a PCE of 22.5%. The BMG ITO electrodes are also compatible with the fabrication of inverted-structure PSCs and organic solar cells. The work demonstrates the great efficacy of improving the conductivity of TCO by BMG and opens up a promising avenue for constructing highly efficient large-area PSCs.