Minimizing the Voltage Loss in Hole‐Conductor‐Free Printable Mesoscopic Perovskite Solar Cells

Abstract

Nevertheless, the efficiency of the printable mesoscopic PSCs still lags behind the conventional PSCs. Though extensive methods have been conducted to improve the performance of such devices, including additives, [12][13][14][15][16] composition engineering, [17,18] and crystallization control, [18][19][20] the highest PCE reported so far is 18.2% using an acetamidinium mixed methylammonium lead iodide perovskite. [21] In the meantime, though FAPbI 3 perovskites are believed and reported to yield higher PCEs, we only achieved a PCE of ≈16% using FAPbI 3 perovskite.

Vacuum‐Assisted Thermal Annealing of CsPbI3 for Highly Stable and Efficient Inorganic Perovskite Solar Cells

“…The fitting slopes of the control and target devices are 1.96 and 1.53 k B T / q , respectively, where T represents the absolute temperature, and k B represents the Boltzmann constant. The smaller slope in the target device indicates suppressed monomolecular recombination, [49] which is well consistent with the results observed above. To further analyze both shallow and deep defects of the thin films and the PSCs, the trap density of states (tDOS) was measured as shown in Figure 4d.…”

A synergistic co-passivation strategy for high-performance perovskite solar cells with large open circuit voltage

“…The first arc in the high-frequency region and the second arc in the low-frequency region correspond to the charge transfer impedance ( R trans ) and charge recombination impedance ( R rec ) in the device, respectively. 51,55 As seen from Table S3 (ESI†), the TSTP-based device shows a smaller R trans of 282.8 Ω and a larger R rec of 891.9 Ω as compared with 400.7 Ω and 365.8 Ω for the control devices, respectively, indicating more efficient charge transfer and fewer carrier recombination losses. To support this explanation, the dark J–V plots of PSCs with and without the TSTP treatment are obtained.…”

Carbon Electrode Endows High‐Efficiency Perovskite Photovoltaics Affordable, Fully Printable, and Durable

“…Through the rational design of perovskite compositions and perovskite-additive interaction, the PCEs based on TiO 2 /ZrO 2 /C mesoporous PSCs improved from 12.84% to 17.68%. [28][29][30][31][32] Unfortunately, one needs to carefully control the infiltration process of perovskite ink, in which the crystallization of perovskite crystals and the contact between perovskites and other active layers should be carefully optimized.…”