Novel hole transporting material based on tetrathiafulvalene derivative: A step towards dopant free, ambient stable and efficient perovskite solar cells

Malik, Haseeb Ashraf; Ma, Longfei; Luo, Junsheng; Xia, Jianxing; Wan, Zhongquan; Khan, Muhammad Kamran; Shao, Xiangfeng; Jia, Chunyang

doi:10.1016/j.solener.2020.03.003

Cited by 10 publications

(9 citation statements)

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“…The overlapping of HOMO and LUMO electron clouds would theoretically lead to high electrical conductivity. [ 17 ] To further explore this point, conductivity measurements for ULLA 1‐7 and reference HTM Spiro‐OMeTAD were carried out, using the organic field‐effect transistor (OFET) configuration with two‐contact electrical conductivity set‐up (Figure S66, Supporting Information). The results obtained (Table 1) highlight the key role of the peripheral substituents on the charge transport ability of ULLA 1‐7, which is improved by the additional functionalization of the thienyl units with ‐N( p ‐MeOC 6 H 4 ) 2 donors.…”

Section: Resultsmentioning

confidence: 99%

Molecular Engineering of Thienyl Functionalized Ullazines as Hole‐Transporting Materials for Perovskite Solar Cells

et al. 2021

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Organic hole‐transporting materials (HTMs) based on the Ullazine core yield so far only moderate power conversion efficiencies of up to 13.08% in perovskite solar cells (PSCs). Aiming to fabricate efficient and stable PSCs, novel Ullazine derivatives bearing thiophene units were designed and synthesized, allowing modulation of the electronic states of the HTMs and further providing defect passivation of the perovskite surface. Experimental and theoretical analysis show that thiophene units with ‐N(p‐MeOC6H4)2 groups improve the conductivity of Ullazine HTMs, boosting the efficiency of PSCs to 20.21%. This value is the highest reported to date for Ullazine‐based HTMs, and is close to the performance of Spiro‐OMeTAD. In addition, unencapsulated PSCs based on the champion Ullazine exhibit superior stability with respect to Spiro‐OMeTAD, retaining nearly 90% of the initial efficiency following 1000 h aging, which is ascribed to a combination of higher water repellency and passivation of defects on the perovskite surface. This work demonstrates the high potential of HTMs based on Ullazine core as substitutes to Spiro‐OMeTAD.

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Section: Resultsmentioning

confidence: 99%

Molecular Engineering of Thienyl Functionalized Ullazines as Hole‐Transporting Materials for Perovskite Solar Cells

et al. 2021

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“…The efficient charge transporting ability of the TTF family of molecules had attracted several research efforts, where TTF derivatives were tried as charge transporting molecules, especially in technologies, such as OFETs. , Wright et al reported H-shaped tetrathiafulvalene derivatives as an efficient electron donor in bulk heterojunction solar cells; among the reported molecules, high hole mobility up to 8.61 × 10 –3 cm 2 V –1 s –1 was reported. A few other studies reported that TTF derivatives can be used as an alternative to spiro-OMeTAD as HTMs . As per the report of Malik et al, a branched-TTF derivative would be better than spiro-OMeTAD in terms of ambient stability and hole mobility.…”

Section: Introductionmentioning

confidence: 84%

“…2-8/2016 (NS/PE) dated 03. 10.2016] and Core Research Grant [CRG/2020/004521], respectively. Author S.K.…”

Section: ■ Acknowledgmentsmentioning

confidence: 99%

“…A few other studies reported that TTF derivatives can be used as an alternative to spiro-OMeTAD as HTMs. 10 As per the report of Malik et al, 10 a branched-TTF derivative would be better than spiro-OMeTAD in terms of ambient stability and hole mobility. Ashassi-Sorkhabi et al 11 reported another branched-tetrathiafulvalene derivative that exhibits better solubility and hole mobility than that of spiro-OMeTAD.…”

Section: Introductionmentioning

confidence: 99%

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Tetrathiafulvalene Derivatives as Hole-Transporting Materials in Perovskite Solar Cell

Krishnan

Senthilkumar

2022

J. Phys. Chem. A

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Over a couple of decades perovskite solar cells have become a highly promising photovoltaic technology. Choosing a dopant-free Hole-Transporting Material (HTM) that offers protection to a perovskite layer from oxidation is one of the viable strategies while addressing the stability of perovskite solar cell. In this line of interest, tetrathiafulvale (TTF) derivatives have shown promise in the past. However, studies that focus on small-molecule TTF derivatives as potential HTM options are scarce. The present study is an attempt to explore the applicability of a few TTF derivatives as HTM in a perovskite solar cell. Here four TTF derivatives, namely, TTF-1 (experimentally reported in a previous study), TTF-2, DBTTF1, and TMTSF1, were studied through electronic structure calculations. The properties concerning HTM, such as impact of adsorption on molecular structure, absorption spectra, distribution of frontier molecular orbitals, interaction energy between TTF derivative and MAPbI3 surface, and charge transfer at an interface, were analyzed. Results show that TTF-2 has the expected energy-level alignment, transparency in the visible range of solar spectrum, and good charge-injection ability at the interface with a perovskite layer. Hence, TTF-2 could be a potential hole-transporting material for a perovskite solar cell, and it can perform better than TTF-1.

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“…Alternatives to PEDOT: PSS have been non-wetting polymers that have produced devices with excellent performance, suitable energy band alignment, appropriate preparation methods, and complimenting other layers in the PSC stack. Xu et al showed that poly(N,N'-bis(4-butylphenyl)-N,N'bis(phenyl)benzidine) (poly-TPD) as a HTM in IPSCs yielded a PCE of 18.1% [17]. Similarly, Liu et Al developed a HTM using poly(bis(4-phenyl) (2,4,6-trimethylphenyl)amine) (PTAA) to attain a PCE of 20.7% [18].…”

Section: Tpd As Htm In Pscsmentioning

confidence: 99%

Charge transport materials, bismuth and copper-based perovskite solar cells: A review

Thomas¹

2022

fuen

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Improving perovskite solar cell (PSC) efficiencies would not have been possible without discovering and incorporating novel materials. More significant than materials usage is the compatibility of various material components in the entire device. Charge transport materials have been at the heart of this discussion to decide a PSC's functioning fundamentally. This review highlights various high-efficiency examples using alternate charge transport materials, bringing us one step closer to commercializing this technology. The article also elaborates on recent innovations in Bismuth and Copper-based PSCs. These are possible candidates to replace the conventional materials used in a standard PSC and affirmatively yield favorable results through extensive research.

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Novel hole transporting material based on tetrathiafulvalene derivative: A step towards dopant free, ambient stable and efficient perovskite solar cells

Cited by 10 publications

References 55 publications

Molecular Engineering of Thienyl Functionalized Ullazines as Hole‐Transporting Materials for Perovskite Solar Cells

Molecular Engineering of Thienyl Functionalized Ullazines as Hole‐Transporting Materials for Perovskite Solar Cells

Tetrathiafulvalene Derivatives as Hole-Transporting Materials in Perovskite Solar Cell

Charge transport materials, bismuth and copper-based perovskite solar cells: A review

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