A dopant-free spirobi[cyclopenta[2,1-b:3,4-b′]dithiophene] based hole-transport material for efficient perovskite solar cells

Franckevičius, Marius; Mishra, Amaresh; Kreuzer, Franziska; Luo, Jingshan; Zakeeruddin, Shaik M.; Grätzel, Michaël

doi:10.1039/c5mh00154d

Cited by 135 publications

(91 citation statements)

References 52 publications

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“…Grätzel and co-workers have developed 4,4′-spirobi[cyclopenta[2,1-b:3,4-b′]dithiophene] derivatives, silolothiophene linked methoxy triphenylamines, conjugated quinolizino acridine derivative and S,N-heteroacene-based oligothiophenes as the HTMs without dopants to get a PCE of 10-13%. [7][8][9][10] Other TPA-based HTMs without dopants applied in the PSC have been synthesized by Li and co-workers obtaining PCEs of 11-13%. [11][12][13][14] Yang and co-workers demonstrated efficient planar perovskite solar cells using two dopant-free donor-acceptor conjugated small molecules as hole-transport materials.…”

Section: Doi: 101002/aenm201600401mentioning

confidence: 99%

A Novel Dopant‐Free Triphenylamine Based Molecular “Butterfly” Hole‐Transport Material for Highly Efficient and Stable Perovskite Solar Cells

Wang

Wei³

et al. 2016

Advanced Energy Materials

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165

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A triphenylamine based molecular “butterfly” is developed as dopant‐free hole‐transport material for perovskite solar cells exhibiting excellent power conversion efficiency of 16.3% which is comparable to the state‐of‐the‐art doped 2,2′,7,7′‐tetrakis(N,N′‐di‐p‐methoxy‐phenylamine)‐9,9′‐spirobifluorene (spiro‐OMeTAD). Moreover, the device is much more stable than that of spiro‐OMeTAD based device under light irradiation.

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Section: Doi: 101002/aenm201600401mentioning

confidence: 99%

A Novel Dopant‐Free Triphenylamine Based Molecular “Butterfly” Hole‐Transport Material for Highly Efficient and Stable Perovskite Solar Cells

Wang

Wei³

et al. 2016

Advanced Energy Materials

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165

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“…9 Also, the lack of crystalline spiro-OMeTAD, in particular single crystals prepared in a controlled manner, prevents access to the intrinsic holetransport properties of spiro-OMeTAD, the understanding of which is important for improving performance [10][11][12] and/or developing alternative organic HTMs. [13][14][15] Very recently, significant experimental progress was made in preparing crystalline spiro-OMeTAD. Ganesan et al reported the first crystal structure of a spiro-OMeTAD complex in which, however, chlorobenzene solvent molecules are also embedded.…”

Section: Introductionmentioning

confidence: 99%

Characterization of intrinsic hole transport in single-crystal spiro-OMeTAD

Zhong

et al. 2017

npj Flex Electron

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Spiro-OMeTAD remains a prominent hole-transport material in perovskite and solid-state dye-sensitized solar cells. However, an understanding of its intrinsic hole-transport properties is still limited. Here, hole transport in spiro-OMeTAD is systematically characterized on the basis of the recently reported X-ray single-crystal data. An approach combining density functional theory calculations, tight-binding modeling, and kinetic Monte Carlo simulations are exploited to describe the key parameters governing hole transport and to investigate the transport mechanism and hole mobilities in the spiro-OMeTAD single crystal. The results provide insight into: (i) why an anisotropic hole-transport mechanism, with an upper range of intrinsic hole mobilities on the order of~10 −3 cm 2 /Vs, can be expected in the single crystal; and (ii) how detrimental factors, related to the presence of the spiro motif and of the 4,4′-dimethoxydiphenylamine substituents, limit the intrinsic hole mobilities of the system.

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“…25 However, apart from a few exceptions, 25,29 most PSCs based on thiophene HTMs show a PCE lower than 16%. [35][36][37][38][39][40][41][42] Herein, we report the synthesis and characterization as well as the application in perovskite solar cells of two novel thiophene-based HTMs, coded Z25 and Z26. The latter is derived by introdution of two double bonds into Z25 as shown in Figure 1a.…”

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confidence: 99%

Over 20% PCE perovskite solar cells with superior stability achieved by novel and low-cost hole-transporting materials

et al. 2017

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The exploration of alternative low-cost molecular hole-transporting materials (HTMs) specifically for both high efficient and stable perovskite solar cells (PSCs) is a relatively new research area. Two novel HTMs using the thiophene core were designed and synthesized (Z25 and Z26). The Z26-based perovskite solar cells exhibited a remarkable overall power conversion efficiency (PCE) of 20.1 %, which is comparable to 20.6% obtained by spiro-OMeTAD-based device. Importantly, the devices based-on Z26 show better stability 2 compared to devices based on Z25 and spiro-OMeTAD when aged under ambient air of 30% or 85% relative humidity in the dark and under continuous full sun illumination at maximum power point tracking respectively. The presented results clearly qualify a simple strategy by introduction of double bonds to design hole transporting materials for highly efficient and

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A dopant-free spirobi[cyclopenta[2,1-b:3,4-b′]dithiophene] based hole-transport material for efficient perovskite solar cells

Abstract: A new spiro-cyclopentadithiophene-based hole transport material has been developed for perovskite solar cells exhibiting an excellent power conversion efficiency of 13.4% without the use of any additives and dopants.

Cited by 135 publications

References 52 publications

A Novel Dopant‐Free Triphenylamine Based Molecular “Butterfly” Hole‐Transport Material for Highly Efficient and Stable Perovskite Solar Cells

A Novel Dopant‐Free Triphenylamine Based Molecular “Butterfly” Hole‐Transport Material for Highly Efficient and Stable Perovskite Solar Cells

Characterization of intrinsic hole transport in single-crystal spiro-OMeTAD

Over 20% PCE perovskite solar cells with superior stability achieved by novel and low-cost hole-transporting materials

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