Enhancing CZTSSe solar cells through electric field induced ion migration

Abstract

Solar cells made from Cu2ZnSn(S,Se)4 (CZTS)-derived materials have been widely studied for their favourable material properties utilized in photovoltaic energy conversion. Drawbacks of the materials are associated with low open...

Electric Field Induced Surface Nanocrystal Growth in 2D Mixed Halide Perovskites

“…The second method used to influence the motion of ions in the 2D perovskite samples was by inserting the perovskite substrates between two capacitor plates spaced 2.5 mm apart and applying ±10 V for an hour (a schematic of the setup can be seen in Figure S6; also see ref 37). Biasing this way resulted in permanent dramatic changes to the surface structure of samples containing more than 50% iodine, while the ±1 V biasing seems to be temporary (sample topography remained the same after biasing for several months).…”

Insights into the Efficiency Improvement for CZTSSe Solar Cells with over 12% Efficiency via Ga Incorporation

“…The topography and local contact potential difference between the sample and the tip due to the charge movement resulting from Fermi level differences could be simultaneously measured using AFM‐KPFM mode. [ 47 ] Figure a,b shows the KPFM images of CZTSSe absorber films without and with 2% Ga‐doping. The corresponding surface line profiles (Figure 6c) for each sample show that the contact potential difference values between GBs and grain interiors (GIs) of the 2% Ga absorber film are higher than those of Ref‐CZTSSe absorber film.…”

Defect engineering of solution-processed ZnO:Li window layers towards high-efficiency and low-cost kesterite photovoltaics

“…Environmentally friendly kesterite Cu 2 ZnSn(S,Se) 4 (CZTSSe) thin-lm solar cells have attracted worldwide attention as one of the leading photovoltaic technologies due to their earthabundant constituents, long-term tolerance stability and superior photovoltaic performance. [1][2][3][4][5][6] Considerable research efforts have been recently devoted to interface engineering, [7][8][9][10][11] defect passivation [12][13][14] and crystallization control, [15][16][17][18] and several groups reported the latest achieved power conversion efficiency (PCE) beyond 13.0%. 19,20 Although the solution-processed absorber offers advantages in elemental composition control at the molecular level and lowering the production cost, the challenge now is to continue this progress in the efficiency improvement, and its open-circuit voltage (V oc ) and ll factor (FF) are much inferior to those of other leading PV technologies.…”