Correction: 20.7% highly reproducible inverted planar perovskite solar cells with enhanced fill factor and eliminated hysteresis

Abstract

Correction for ‘20.7% highly reproducible inverted planar perovskite solar cells with enhanced fill factor and eliminated hysteresis’ by Xixia Liu et al., Energy Environ. Sci., 2019, DOI: 10.1039/c9ee00872a.

Innovative PIN-type perovskite solar cells with 17% efficiency: processing and characterization

“…As shown in Figures S2 and 2a, the use of diethyl ether (DE) here leads to a macroscopically noncompliant perovskite layer, and the use of the common chlorobenzene (CB) to large holes of about 30 µm without perovskite and beneath HTL, indicating the dissolution of this latter, as also observed in literature 31 and confirmed by the test presented in Figure S2. Although the use of other anti-solvents leads to more homogeneous deposits, microscopic observations show much smaller pinhole diameters (less than 15 µm, and without any HTL dissolution) in the case of ethyl acetate (EA) and isopropanol (IPA).…”

“…But unlike PEDOT:PSS, these hydrophobic layers disturb the deposition of the perovskite layer. Several approaches are proposed in the literature to improve the wettability of the perovskite on these hydrophobic layers 30,31 , but it is preferable to preserve the nature of the materials, and quite possible to optimize the quality of the perovskite layer by solely varying the processing conditions. We propose here a double optimization of the material and process to maximize the PCE of the devices.…”

Effect of the Hole Transporting/Active Layer Interface on the Perovskite Solar Cell Stability

“…Only a few publications were found relating either its thermo-oxidation at temperature above 65 °C49 or its degradation when subjected to a UV−ozone light. 50 This degradation was due to the high energy of the UV light used (648 kJ/mol for 184.9 nm), 51 which is high enough to break all PTAA bonds (C−C, 347 kJ/ mol; C−N, 305 kJ/mol; CC, 611 kJ/mol). 52 First, PTAA films were isolated and aged under the same conditions as those of the PSC devices (same thickness, temperature, and atmosphere).…”

“…To the best of our knowledge, no publication mentions the stability of PTAA at ambient temperatures. Only a few publications were found relating either its thermo-oxidation at temperature above 65 °C or its degradation when subjected to a UV–ozone light . This degradation was due to the high energy of the UV light used (648 kJ/mol for 184.9 nm), which is high enough to break all PTAA bonds (C–C, 347 kJ/mol; C–N, 305 kJ/mol; CC, 611 kJ/mol)…”

Enhanced Efficiency and Mechanical Robustness of Flexible Perovskite Solar Cells by Using HPbI3 Additive

“…The enhanced efficiency is mainly due to the clearly increased V oc , which is increased from 1.02 to 1.12 V. The hysteresis index (HI) can be calculated for evaluating the hysteresis loss. [ 47 ] The HI is significantly decreased from 0.075 for the pristine device (Figure S1, Supporting Information) to 0.01 for the 5% HPbI 3 ‐incorporated PSCs. The effectively eliminated hysteresis indicates the decreased bulk defect density [ 48 ] by the HPbI 3 addition.…”