High-efficiency perovskite solar cells employing a conjugated donor–acceptor co-polymer as a hole-transporting material

Abstract

In this work, we have successfully demonstrated that molecularly p-doping of donor–acceptor co-polymer PCPDTBT as an efficient hole-transporting material in perovskite solar cells with a decent power conversion efficiency of 15.1%.

Accurately Stoichiometric Regulating Oxidation States in Hole Transporting Material to Enhance the Hole Mobility of Perovskite Solar Cells

“…To investigate the doping effects of OPTZ on NPTZ, different concentrations of OPTZ were added into NPTZ chlorobenzene solution with ratios (NPTZ: OPTZ w/w) of 50:1 (2%), 20:1 (5%), 10:1 (9%), 5:1 (17%), 2:1 (33%), and 1:1 (50%). As shown in Figure a, the color change of the mixture solution was very obvious from yellow to red, similar to other reported doped systems . UV–vis absorption spectra and the enlarged view (from 450 to 800 nm) of the mixture in chlorobenzene solution are shown in Figure b,c, respectively.…”

Efficient and Stable Inverted Planar Perovskite Solar Cells Employing CuI as Hole‐Transporting Layer Prepared by Solid–Gas Transformation

“…Notably, the device based on CuI shows a negligible hysteresis. This result suggests that a CuI film can effectively facilitate hole extraction and reduce charge accumulation at the interface, which would give rise to a negligible hysteresis …”

“…Notably,t he device based on CuI shows an egligible hysteresis.T his result suggests that aC uI film can effectively facilitate hole extraction and reducec harge accumulation at the interface,w hich would give rise to anegligible hysteresis. [18] To better understand the hole-transfer property of the asprepared CuI film, we carried out steady-state photoluminescence (PL) and time-resolved PL decay measurements of CuI/perovskite films.A ss hown in Figure 4a,t he pristine per-ovskite film shows ah igh PL emission peak centered at 760 nm. As ignificant quenching effect is clearly observed in the presence of the CuI HTL.…”

Star-shaped triarylamine-based hole-transport materials in perovskite solar cells

“…10,11 Hence, a wide number of alternative HTMs structures has been investigated in PSCs including inorganic materials, [12][13][14] small organic molecules [15][16][17] and polymers. [18][19][20] Among all the molecular motifs used for HTMs, triphenylamines (TPAs) are one of the most promising candidates. To date, TPA-based materials like 2,2,7,7 0 -tetrakis(N,N-di-pmethoxyphenylamine)-9,9 0 -spirobiuorene (spiro-OMeTAD) 21,22 and poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) 23,24 are the most popular and best performing HTMs in PSCs.…”