Efficient perovskite solar cells enabled by large dimensional structured hole transporting materials

Abstract

A large dimensional structured hole transporting material exhibits excellent photovoltaic performance in perovskite solar cells.

Benzotriazole based polymers with different side chains employed as dopant-free hole-transporting materials for high-efficiency perovskite solar cells

“…τ ave of perovskite/PBTA-26 (130 ns) is lower than that of the pristine perovskite (194 ns) and perovskite/PBTA-8 (166 ns), which are consistent with the steady-state PL quenching efficiency, implying the faster charge transfer at the perovskite/PBTA-26 interface. 65…”

“…t ave of perovskite/PBTA-26 (130 ns) is lower than that of the pristine perovskite (194 ns) and perovskite/PBTA-8 (166 ns), which are consistent with the steady-state PL quenching efficiency, implying the faster charge transfer at the perovskite/PBTA-26 interface. 65 Fig. 7 displayed the atomic force microscopy (AFM) morphology of the pristine perovskite as well as the perovskite covered with HTMs.…”

Advancements in organic small molecule hole-transporting materials for perovskite solar cells: past and future

“…HTL becomes highly hydrophilic with Li-TFSI, due to its hygroscopic nature. [135][136][137][138][139][140][141] It tends to cause chemical degradation and has an adverse effect on the device stability. Researchers had shown the reaction of tBP with perovskite and dissolve it.…”

A Universal Dopant-Free Polymeric Hole-Transporting Material for Efficient and Stable All-Inorganic and Organic–Inorganic Perovskite Solar Cells

“…40 Recently, they further synthesized a novel HTM (YT5) with a larger dimensional structure and obtained attractive device performance in both organic−inorganic hybrid and all-inorganic PSCs. 41 Yip et al fabricated inverted CsPbI 2 Br PSCs using a new 3D small molecule (TPE-S) as a dopant-free HTM and realized an impressive efficiency of 15.4% along with excellent stability. 42 They also developed conjugated polymer HTMs based on polytriphenylamine (TPA) and polysquaraine (SQ), which delivered remarkable hole mobility and improved stability.…”

“…Therefore, to avoid the trade-off between the stability and photovoltaic performance of CsPbI 2 Br PSCs, alternative dopant-free HTMs were developed in recent years. − Hua et al constructed a cyclopenta­[ hi ]­aceanthrylene-based dopant-free D-A-D-type HTM (YN3) with good conductivity and hole mobility, rendering an enhanced PCE of 12.05% compared to that of the reference Spiro-OMeTAD-based PSCs . Recently, they further synthesized a novel HTM (YT5) with a larger dimensional structure and obtained attractive device performance in both organic–inorganic hybrid and all-inorganic PSCs . Yip et al fabricated inverted CsPbI 2 Br PSCs using a new 3D small molecule (TPE-S) as a dopant-free HTM and realized an impressive efficiency of 15.4% along with excellent stability .…”