Low cost triazatruxene hole transporting material for &gt;20% efficiency perovskite solar cells

Connell, Arthur; Wang, Zhiping; Lin, Yen‐Hung; Greenwood, Peter; Wiles, Alan A.; Jones, Eurig W.; Furnell, Leo; Anthony, Rosie; Kershaw, Christopher P.; Cooke, Graeme; Snaith, Henry J.; Holliman, Peter J.

doi:10.1039/c8tc04231d

Cited by 53 publications

(43 citation statements)

References 32 publications

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“…In one of the earliest reports, 18.3% device performance was achieved employing triazatruxene-based KR131 , which exhibited surface interaction with the perovskite material resulting in efficient hole injection from the valence band of perovskite into the HOMO of the HTM, outperforming the reference spiro-OMeTAD 122. Very recently, another triazatruxene HTM TAT- t BuSty was reported to achieve a PCE of 20.3% 123. Cho and co-workers reported a fluorinated indolo[3,2- b ]indole-based derivative IDIDF 124.…”

Section: Introductionmentioning

confidence: 99%

Efficiencyvs.stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

2019

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Section: Introductionmentioning

confidence: 99%

Efficiencyvs.stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

2019

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“…[ 24 ] Focusing in the donor core unit, a planar nitrogen‐containing triazatruxene (TAT) is a good candidate due to the excellent optical and electronic properties, strong π–π intermolecular interaction, high hole mobility, and wide synthetic variety with tunable properties. [ 25 ] In addition, the nitrogen atom of the indole unit helps to stabilize the oxidized radical cation formed during device operation, [ 25 ] and from a synthetic perspective, it can also be prepared from low‐cost precursors synthesized from abundant natural products. In contrast, thiophene π‐bridge units can stabilize the molecule increasing the double‐bond character, and D–π–A molecules containing them have shown lowered bandgaps, higher hole mobility, and higher photovoltaic performance compared with furan‐bridged molecules.…”

Section: Introductionmentioning

confidence: 99%

D–π–A‐Type Triazatruxene‐Based Dopant‐Free Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells

et al. 2020

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Three donor–π‐bridge–acceptor (D–π–A)‐type organic small molecules coded CI‐B1, CI‐B2, and CI‐B3 are designed, synthesized, and used as dopant‐free hole transporting materials (HTMs) for perovskite solar cells (PSCs). The strong electron‐donating triazatruxene central core (D), terthiophene conjugated arms (π), and three different strong electron‐accepting units (A) provide high intramolecular charge transfer nature and eliminate the need of dopants during the fabrication of PSCs. HTMs are investigated to understand the effect of terminal functional groups on the PSC performance. Interestingly, due to the change of end‐capping, three different organizations of self‐assembly with π–π stacking are observed in the solid thin films. Dopant‐free CI‐B1, CI‐B2, CI‐B3, and spiro‐OMeTAD with dopants are used with triple cation perovskite composition Cs0.1(MA0.15FA0.85)0.9Pb(I0.85Br0.15)3 (MA: CH3NH3+, FA: NHCHNH3+) in n‐i‐p architecture. The cells prepared with CI‐B3 not only exhibits a comparable power conversion efficiency (PCE) of 17.54% to the state‐of‐art of spiro‐OMeTAD with dopants (18.02%), but also demonstrates improved long‐term stability, maintaining 88% of its original PCE after 1000 h of illumination. The superior photovoltaic performance, synthetic simplicity, dopant‐free nature, high durability, and edge‐on molecular orientation of CI‐B3 show its great promise as a HTM candidate for efficient and stable PSCs.

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“…Low material costs-unlike in many conventional PSCs, expensive noble metals and organics that require costly purification processes (like spiro-OMeTAD) are not required [24]; •…”

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Triple-Mesoscopic Carbon Perovskite Solar Cells: Materials, Processing and Applications

et al. 2021

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Perovskite solar cells (PSCs) have already achieved comparable performance to industrially established silicon technologies. However, high performance and stability must be also be achieved at large area and low cost to be truly commercially viable. The fully printable triple-mesoscopic carbon perovskite solar cell (mCPSC) has demonstrated unprecedented stability and can be produced at low capital cost with inexpensive materials. These devices are inherently scalable, and large-area modules have already been fabricated using low-cost screen printing. As a uniquely stable, scalable and low-cost architecture, mCPSC research has advanced significantly in recent years. This review provides a detailed overview of advancements in the materials and processing of each individual stack layer as well as in-depth coverage of work on perovskite formulations, with the view of highlighting potential areas for future research. Long term stability studies will also be discussed, to emphasise the impressive achievements of mCPSCs for both indoor and outdoor applications.

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Low cost triazatruxene hole transporting material for >20% efficiency perovskite solar cells

Abstract: Organic hole-transporting materials (HTM) have shown excellent ability in achieving high efficiency perovskite solar cells.

Cited by 53 publications

References 32 publications

Efficiencyvs.stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

Efficiencyvs.stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

D–π–A‐Type Triazatruxene‐Based Dopant‐Free Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells

Triple-Mesoscopic Carbon Perovskite Solar Cells: Materials, Processing and Applications

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