Alternative benzodithiophene (BDT) based polymeric hole transport layer for efficient perovskite solar cells

Gaml, Eman A.; Dubey, Ashish; Reza, Khan Mamun; Hasan, Nazmul; Adhikari, Nirmal; Elbohy, Hytham; Bahrami, Behzad; Zeyada, H.M.; Yang, Shangfeng; Qiao, Qiquan

doi:10.1016/j.solmat.2017.04.002

Cited by 39 publications

(18 citation statements)

References 36 publications

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“…The OMeDAD moiety enhances the molecule’s hole-transporting capabilities, and a PCE of 16.09% has been reported, which is significantly better than that of the spiro-OMeTAD-based reference cells (9.62%). Gaml et al have reported the use of benzodithiophene-based polymer poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b’]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)], PBDTT-FTTE, as an HTM in PSCs [ 119 ]. After doping PBDTT-FTTE with 3% of diiodooctane, it led to PSCs with similar performance as conventional spiro-OMeTAD-based devices in an inert atmosphere, but with an enhanced fill factor and open-circuit voltage.…”

Section: Hole-transporting Materialsmentioning

confidence: 99%

Hole-Transporting Materials for Printable Perovskite Solar Cells

2017

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Perovskite solar cells (PSCs) represent undoubtedly the most significant breakthrough in photovoltaic technology since the 1970s, with an increase in their power conversion efficiency from less than 5% to over 22% in just a few years. Hole-transporting materials (HTMs) are an essential building block of PSC architectures. Currently, 2,2 ,7,7 -tetrakis-(N,N -di-p-methoxyphenylamine)-9,9 -spirobifluorene), better known as spiro-OMeTAD, is the most widely-used HTM to obtain high-efficiency devices. However, it is a tremendously expensive material with mediocre hole carrier mobility. To ensure wide-scale application of PSC-based technologies, alternative HTMs are being proposed. Solution-processable HTMs are crucial to develop inexpensive, high-throughput and printable large-area PSCs. In this review, we present the most recent advances in the design and development of different types of HTMs, with a particular focus on mesoscopic PSCs. Finally, we outline possible future research directions for further optimization of the HTMs to achieve low-cost, stable and large-area PSCs.

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Section: Hole-transporting Materialsmentioning

confidence: 99%

Hole-Transporting Materials for Printable Perovskite Solar Cells

2017

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“…[ 158 ] Solution‐processable conjugated polymers and small molecules have been intensively used due to their multiple favorable characteristics such as high mobility, effective surface, defect passivation, and low temperature processibility. [ 159–164,183 ] In fact, these HTMs have shown comparable or better overall performances than spiro‐OMeTAD based devices, which are tabulated in Table 2. On the other hand, various metal oxides (i.e., NiO x , CuO) are also being explored as an alternative for organic HTMs.…”

Section: Perovskite Solar Cells: Device Architectures Materials and Electrodesmentioning

confidence: 99%

Emerging Perovskite Solar Cell Technology: Remedial Actions for the Foremost Challenges

Sahare

Pham

Angmo

et al. 2021

Advanced Energy Materials

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Perovskite solar cells (PSCs) exhibit the steepest growth in power conversion efficiency among the existing photovoltaic technologies. However, a wide range of factors restrict the commercial viability of PSCs as a renewable energy source. This article reviews the latest progress in PSC devices including innovative light‐harvesting perovskite materials and advanced interfacial layers, and the foremost challenges. The most promising remedial solutions to challenges are also discussed. For the realization of a high performing and eco‐friendly stabilized perovskite photovoltaic device, a combinational method involving multiple restorative solutions is required. A specific emphasis is given to unveiling interesting perovskite properties, and device fabrication approaches to the solutions. These remedies and strategies may help researchers to select appropriate methods and design their experiments to obtain a high photo‐conversion efficiency in photovoltaic devices with enhanced stability as compared to conventional photovoltaic devices.

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“…For example, Xinqi Li et al have recently achieved highly efficient and stable PSCs by employing BDT‐based dopant‐free HTMs and adding polymer donor materials into anti‐solvent 21 . Hence, side chain tuning and electron donor‐electron acceptor (D‐A) alternating copolymerization have been attempted to optimize the energy levels, morphologies, and charge extraction/transport abilities of BDT‐based polymeric HTMs, which is required for the efficient delivering of photo generated carriers from perovskite absorber to anode 22–28 . However, the complicated and additional synthesis steps for these approaches have still prevented the further optimization and the commercialization of BDT‐based polymeric HTMs for high performance PSCs.…”

Section: Introductionmentioning

confidence: 99%

Structurally‐tuned benzo[1,2‐b:4,5:b']dithiophene‐based polymer as a dopant‐free hole transport material for perovskite solar cells

Opoku

Lee

Nketia‐Yawson

et al. 2021

Journal of Polymer Science

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For highly efficient and stable perovskite solar cells (PSCs), hole transport material (HTM) should be designed and synthesized to afford suitable energy levels, high charge transport, efficient passivation ability, and high device stability. Here, we systematically modulated benzo[1,2‐b:4,5:b']dithiophene‐based polymer by finely controlling the thienyl and pyridyl contents within the conjugated backbone in order to develop a high performance dopant‐free HTM for PSCs. We found that the optimized copolymer with 25% of pyridine content exhibits improved energy level, charge transport, and morphology compared with control homopolymers. As a result, remarkably high power conversion efficiencies up to 21.1% were achieved by employing the optimized polymer as a dopant‐free HTM in PSCs.

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Alternative benzodithiophene (BDT) based polymeric hole transport layer for efficient perovskite solar cells

Cited by 39 publications

References 36 publications

Hole-Transporting Materials for Printable Perovskite Solar Cells

Hole-Transporting Materials for Printable Perovskite Solar Cells

Emerging Perovskite Solar Cell Technology: Remedial Actions for the Foremost Challenges

Structurally‐tuned benzo[1,2‐b:4,5:b']dithiophene‐based polymer as a dopant‐free hole transport material for perovskite solar cells

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