High-Efficient Solid-State Perovskite Solar Cell Without Lithium Salt in the Hole Transport Material

Bi, Dongqin; Boschloo, Gerrit; Hagfeldt, Anders

doi:10.1142/s1793292014400013

Cited by 34 publications

(33 citation statements)

References 44 publications

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“…On the other hand, to investigate the effect of additives for stability, we conducted the same stability test at 85 °C with V873 containing LiTFSI and tBP. The concentration of additives is in similar range to that of PTAA as previously reported . The data reveals that the devices with additive‐doped V873 show significant degradation at 85 °C, which is strong evidence for the negative effect of additives.…”

Section: Figuresupporting

confidence: 79%

Additive‐Free Transparent Triarylamine‐Based Polymeric Hole‐Transport Materials for Stable Perovskite Solar Cells

et al. 2016

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Triarylamine-based polymers with different functional groups were synthetized as hole-transport materials (HTMs) for perovskite solar cells (PSCs). The novel materials enabled efficient PSCs without the use of chemical doping (or additives) to enhance charge transport. Devices employing poly(triarylamine) with methylphenylethenyl functional groups (V873) showed a power conversion efficiency of 12.3 %, whereas widely used additive-free poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) demonstrated 10.8 %. Notably, devices with V873 enabled stable PSCs under 1 sun illumination at maximum power point tracking for approximately 40 h at room temperature, and in the dark under elevated temperature (85 °C) for more than 140 h. This is in stark contrast to additive-containing devices, which degrade significantly within the same time frame. The results present remarkable progress towards stable PSC under real working conditions and industrial stress tests.

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Section: Figuresupporting

confidence: 79%

Additive‐Free Transparent Triarylamine‐Based Polymeric Hole‐Transport Materials for Stable Perovskite Solar Cells

et al. 2016

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“…The highest PCE of 12.0% was obtained for the best device with LiTFSI and tBP doped PTAA as HTM. However, an efficiency of 10.9% for PSCs was reported with employing PTAA as HTM, without using LiTFSI and in the presence of tBP, in a study carried out by Bi et al Jeon et al have reported a PSC with a bilayer architecture comprising mesoscopic and planar structures and MAPb(I 1–x Br x ) 3 perovskites formed by a solvent‐engineering technology . They have achieved a PCE of as high as 16.5% by employing PTAA as HTM with using dopants.…”

Section: Dopant‐free Hole Transporting Materials For Pscsmentioning

confidence: 99%

Dopant‐Free Hole Transporting Materials for Perovskite Solar Cells

Rezaee

Liu

et al. 2018

Solar RRL

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This article reviews various dopant-free hole transporting materials (HTMs) used in perovskite solar cells (PSCs) in three main categories including inorganic, polymeric, and small molecule HTMs. PSCs have undergone rapid progress, achieving power conversion efficiencies (PCEs) above 22%. With their low production cost and high efficiencies, PSCs are considered promising next-generation solar cell technology. In all developed architectures for PSCs, including planar and mesoscopic with conventional and inverted structures, HTMs play a significant role in determining the photovoltaic performance of PSCs. Using p-type dopants, however, is considered a common strategy to increase the hole conductivity of HTM, which is usually compensated by a more complicated fabrication procedure, higher production costs, and lower stability of PSC. Although several reviews on HTMs have been published, progress on dopant free HTMs needs to be reviewed and analyzed. Here, a review covering most of the published reports on dopantfree HTMs is presented, and the device structure and fabrication method, HTM layer deposition techniques, and the efficiency and the stability of PSCs are addressed during discussions in each main category. Finally, an outlook on stability and PCE growth in PSCs based on dopant-free HTMs is presented.

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“…† The PCEs for the PTAA (11.23%), P3HT (6.64%) and Spiro (8.62%) control devices were all similar to reported values for devices prepared using simple MAPI processing conditions. 8,[44][45][46] Higher PCE values should be obtainable using processing enhancements designed to increase the PCE. For example, MAPI/Spiro PCSs with efficiency values as high as 16.27%, 15.76 and 16.27% have been reported using extra-dry isopropanol, 47 consecutive compact and mesoporous TiO 2 48 or anti-solvents, 41 respectively.…”

Section: Perovskite Solar Cells Prepared Using Htm-mg Blendsmentioning

confidence: 99%

Reducing hole transporter use and increasing perovskite solar cell stability with dual-role polystyrene microgel particles

Mokhtar

Whittaker

et al. 2017

Nanoscale

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Perovskite solar cells (PSCs) are a disruptive technology that continues to attract considerable attention due to their remarkable and sustained power conversion efficiency increase. Improving PSC stability and reducing expensive hole transport material (HTM) usage are two aspects that are gaining increased attention. In a new approach, we investigate the ability of insulating polystyrene microgel particles (MGs) to increase PSC stability and replace the majority of the HTM phase. MGs are sub-micrometre crosslinked polymer particles that swell in a good solvent. The MGs were prepared using a scalable emulsion polymerisation method. Mixed HTM/MG dispersions were subsequently spin-coated onto PSCs and formed composite HTM-MG layers. The HTMs employed were poly(triaryl amine) (PTAA), poly(3-hexylthiophene) (P3HT) and Spiro-MeOTAD (Spiro). The MGs formed mechanically robust composite HTMs with PTAA and P3HT. In contrast, Spiro-MG composites contained micro-cracks due the inability of the relatively small Spiro molecules to interdigitate. The efficiencies for the PSCs containing PTAA-MG and P3HT-MG decreased by only ∼20% compared to control PSCs despite PTAA and P3HT being the minority phases. They occupied only ∼35 vol% of the composite HTMs. An unexpected finding from the study was that the MGs dispersed well within the PTAA matrix. This morphology aided strong quenching of the CHNHPbICl fluorescence. In addition, the open circuit voltages for the PSCs prepared using P3HT-MG increased by ∼170 mV compared to control PSCs. To demonstrate their versatility the MGs were also used to encapsulate P3HT-based PSCs. Solar cell stability data for the latter as well as those for PSCs containing composite HTM-MG were both far superior compared to data measured for a control PSC. Since MGs can reduce conjugated polymer use and increase stability they have good potential as dual-role PSC additives.

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High-Efficient Solid-State Perovskite Solar Cell Without Lithium Salt in the Hole Transport Material

Cited by 34 publications

References 44 publications

Additive‐Free Transparent Triarylamine‐Based Polymeric Hole‐Transport Materials for Stable Perovskite Solar Cells

Additive‐Free Transparent Triarylamine‐Based Polymeric Hole‐Transport Materials for Stable Perovskite Solar Cells

Dopant‐Free Hole Transporting Materials for Perovskite Solar Cells

Reducing hole transporter use and increasing perovskite solar cell stability with dual-role polystyrene microgel particles

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