Disodium Benzodipyrrole Sulfonate as Neutral Hole-Transporting Materials for Perovskite Solar Cells

Abstract

Hole-transporting material (HTM) is an indispensable constituent in organic electronic devices, generally comprising a donor/dopant combination. We report that a disodium salt of substituted benzo[1,2- b:4,5- b']dipyrrole bearing two racemic alkanediylsulfonate anion side chains (BDPSOs) serves as a neutral, nonhygroscopic, dopant-free HTM for lead perovskite (MAPbI) solar cells. These organic/inorganic hybrid molecules are useful for tunable orbital level and controllable solubility. A fluorinated BDPSO has an energy level matched with MAPbI, affording an inverted-structure solar cell that performs with 17.2% efficiency with minimal hysteresis. The solar cell devices fabricated using BDPSOs showed remarkable storage and operational stability.

Dopant‐Free, Donor–Acceptor‐Type Polymeric Hole‐Transporting Materials for the Perovskite Solar Cells with Power Conversion Efficiencies over 20%

“…[1][2][3][4][5][6][7] Recently, PVSCs displaying maximum PCEs of over PCE of 19.06%. [1][2][3][4][5][6][7] Recently, PVSCs displaying maximum PCEs of over PCE of 19.06%.…”

A peri‐Xanthenoxanthene Centered Columnar‐Stacking Organic Semiconductor for Efficient, Photothermally Stable Perovskite Solar Cells

“…[1k, 4f,i,j, 6] On the other hand, unlike inorganic [1g, 7] and polymerich ole-transporting materials, [8] small-molecule-based hole-transporters are scarcely reported for stable perovskite solar cells under dual thermal-and light stress. [9] In 2018,S hang and his co-workers [10] utilized ab enzodipyrrolebasedh ole-conductorf or a1 7.2 %-efficiency PSC exhibiting good stabilitya t3 58C. Later,L ee et al [1k] reported af luoreneterminated hole-conductor for a6 08Cs table PSC stored in the dark.…”

Synergistic Coassembly of Highly Wettable and Uniform Hole‐Extraction Monolayers for Scaling‐up Perovskite Solar Cells

“…While in the p–i–n type PSCs, the hydrophilic HELs underneath the perovskite are not exposed to the ambient environment directly, which will reduce the risk of causing perovskite decomposition. On the other hand, the hydrophilic adsorbent in the present work is neutral rather than acidic (like PEDOT:PSS), which might be another reason for the enhanced stability of the perovskite films . We also investigated the thermal stability of the PSCs based on c‐SA HELs by heating the unencapsulated devices at 85 °C in glove box and recording their efficiency at fixed time interval.…”

“…The positive–intrinsic–negative (p–i–n) featured PSCs based on dopant‐free organic CTLs have promising commercial potential for their simple device architectures, low‐temperature and full‐solution manufacturing process as well as high ambient stability . In principle, the dopant‐free organic CTLs should be as thin as possible to minimize the resistive losses, while at the same time they should be dense and compact to block undesired charge recombination.…”