Annealing free tin oxide electron transport layers for flexible perovskite solar cells

Fluorinated Interfaces for Efficient and Stable Low‐Temperature Carbon‐Based CsPbI2Br Perovskite Solar Cells

“…The KTFA and CF 3 PMABr-modified device showed the lowest leakage current and smallest ideally factor (m), suggesting improved charge transport and suppressed nonradiative recombination. [14,[61][62] This result is consistent with the decreased series resistance (R s ) and contact resistance (R tra ) as well as increased recombination resistance (R rec ) fitted from the electrochemical impedance spectroscopy (EIS) spectra (Figures S26, S27 and Table S11, Supporting Information). The transient photocurrent (TPC) and transient photovoltage (TPV) measurements are used to evaluate charge transport time (τ tra ) and charge recombination lifetime (τ rec ) in C-PSCs, respectively (Figure S28a,b, Supporting Information).…”

Defect management by a cesium fluoride-modified electron transport layer promotes perovskite solar cells

“…The slope of the curve can be obtained by linearly fitting the function: Z id k B T/q, where Z id is the ideal factor, k B the Boltzmann constant, T the absolute temperature, and q the elementary charge. 56 The Z id value of the CsF-modified PSC is 1.08, which is much lower than that of the original PSC (1.43). The results show that the CsF-modified PSC can effectively inhibit non-radiative recombination, which is consistent with the TPV results below.…”

Organic ammonium chloride salt incorporated SnO2electron transport layers for improving the performance of perovskite solar cells

“…1(A). 38 Although this is a reversible reaction, the reaction process tends to be in the direction of the formation of PA due to the strong alkalinity of the solution. As the amount of PACl addition increases, the gradually decreased alkalinity of the solution suggests consumption of the hydroxide (Fig.…”