Enhancing charge transport in an organic photoactive layer <i>via</i> vertical component engineering for efficient perovskite/organic integrated solar cells

Wang, Chenyun; Bai, Yiming; Guo, Qiang; Zhao, Chunyan; Zhang, Jin; Hu, Siqian; Hayat, Tasawar; Alsaedi, Ahmed; Tan, Zhan’ao

doi:10.1039/c8nr09467e

Cited by 25 publications

(34 citation statements)

References 42 publications

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“…Wang et al constructed an organic bulk heterojunction (BHJ) network containing organic donor (PBDB-T) and acceptor (IEICO) as HTL of perovskite solar cells. [87] The distribution of organic donor and acceptor in the HTL was investigated using ToF-SIMS. ToF-SIMS results (Figure 11e-h) indicate that the donor-acceptor network is the vertical stratification in the PBDB-T:IEICO = 1:1 HTL film (device 1) and is bicontinuous in the PBDB-T:IEICO = 1:0.7 film (device 2).…”

Section: Htlmentioning

confidence: 99%

“…ToF-SIMS results (Figure 11e-h) indicate that the donor-acceptor network is the vertical stratification in the PBDB-T:IEICO = 1:1 HTL film (device 1) and is bicontinuous in the PBDB-T:IEICO = 1:0.7 film (device 2). [87] According to the recombination mechanism in BHJ film, a vertical stratification network is detrimental to the hole transport and a bicontinuous network is favorable for the hole transport. Therefore, the perovskite solar cell with a bicontinuous HTL shows a higher PCE of 15.47%.…”

Section: Htlmentioning

confidence: 99%

“…Therefore, the perovskite solar cell with a bicontinuous HTL shows a higher PCE of 15.47%. [87] In another work, a similar molecule of (2,20-((2Z,20Z)-(((4,4,9,9-tetrakis(4-hexylphenyl)-4,9-dihydro-sindaceno [1,2-b:5,6-b0] dithiophene-2,7-diyl)bis(4-((2-ethylhexyl) oxy)thiophene-5,2-diyl)) bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-iylidene))dimalononitrile (IEICO-4F)) was dissolved in cholorobenzene as antisolution to treat perovskite films during spin-casting. [88] In the solar cells [81] Copyright 2019, American Chemical Society.…”

Section: Htlmentioning

confidence: 99%

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Secondary Ion Mass Spectrometry (SIMS) for Chemical Characterization of Metal Halide Perovskites

Liu

Lorenz

Ievlev

et al. 2020

Adv Funct Materials

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Metal halide perovskite (MHP) solar cells have attracted much attention due to the rapidly growing power conversion efficiency that has reached 25.2% in a decade, comparable to established commercial photovoltaic modules. Compositional engineering is one of the most effective methods to boost the performance of MHP solar cells. Further improving the efficiency and the stability of MHP solar cells necessitates good understanding of the chemical–efficiency correlation and the chemical evolution during the degradation of MHP solar cells. In this regard, time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) is a powerful tool to investigate the chemical aspect of MHPs and has played an important role in advancing the development of MHP optoelectronics. However, up to date, a review that can guide future utilization of ToF‐SIMS in the MHP development is missing. Herein, the capabilities of ToF‐SIMS in MHP investigations are summarized and analyzed from simple material synthesis and chemical distribution to more complicated device operation mechanism and stability. The strength of ToF‐SIMS in resolving important issues in this field, such as interface composition, ion migration, and degradation in MHP is highlighted. Finally, an outlook with an emphasis on making the utmost of ToF‐SIMS in developing MHP devices is provided.

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Section: Htlmentioning

confidence: 99%

Section: Htlmentioning

confidence: 99%

Section: Htlmentioning

confidence: 99%

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Secondary Ion Mass Spectrometry (SIMS) for Chemical Characterization of Metal Halide Perovskites

Liu

Lorenz

Ievlev

et al. 2020

Adv Funct Materials

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“…Recently, according to the rules of energy level alignment and complementary absorption, an integrated two photoactive layer concept made by depositing a low-bandgap organic bulk-heterojunction (BHJ) layer on perovskite was proposed to extend pero-SCs' photoresponse. [25][26][27][28][29] Yang et al demonstrated an efficient integrated solar cell (ISC) by simply depositing an organic BHJ film onto MAPbI 3−x Cl x ; this achieved an additional 1.9 mA cm −2 photocurrent density increase. [29] Following the energy level matching principle, Jen et al integrated a porphyrin-derivative donor-based BHJ film with MAPbI 3 , thus extending the photoresponse to 900 nm.…”

Section: Introductionmentioning

confidence: 99%

“…[26] Tan et al tuned the donor/acceptor weight ratios of BHJ film to enhance their charge transporting ability, and the J sc of the resultant ISC was successfully increased from 21.82 to 23.11 mA cm −2 . [27] Nevertheless, most ISCs generally exhibit a weak photocurrent contribution within 10% and are accompanied by a seriously deteriorated fill factor (FF). These behaviors indicate that the generated carriers in organic BHJ films are not sufficiently collected due to considerable charge carrier recombination in them or at the interface close to BHJ film.…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution Recast for Organic Bulk Heterojunctions for High‐Performance All‐Inorganic Perovskite/Organic Integrated Solar Cells

Chen

et al. 2020

Advanced Energy Materials

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All‐inorganic CsPbIBr2 perovskite solar cells (pero‐SCs) exhibit excellent overall stability, but their power conversion efficiencies (PCEs) are greatly limited by their wide bandgaps. Integrated solar cells (ISCs) are considered to be an emergent technology that could extend their photoresponse by directly stacking two distinct photoactive layers with complementary bandgaps. However, rising photocurrents always sacrifice other photovoltaic parameters, thereby leading to an unsatisfactory PCE. Here, a recast strategy is proposed to optimize the spatial distribution components of low‐bandgap organic bulk‐heterojunction (BHJ) film, and is combined with an all‐inorganic perovskite to construct perovskite/BHJ ISCs. With this strategy, the integrated perovskite/BHJ film with a top‐enriched donor‐material spatial distribution is shown to effectively improve ambipolar charge transport behavior and suppress charge carrier recombination. For the first time, the ISC is not only significantly extended and enhanced the photoresponse achieving a 20% increase in current density, but also exhibits a high open‐circuit voltage and fill factor at the same time. As a result, a record PCE of 11.08% based on CsPbIBr2 pero‐SCs is realized; it simultaneously shows excellent long‐term stability against heat and ultraviolet light.

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Light Management through Organic Bulk Heterojunction and Carrier Interfacial Engineering for Perovskite Solar Cells with 23.5% Efficiency

Shi

Zhou

Zhuang

et al. 2022

Adv Funct Materials

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Light management through organic bulk heterojunction (BHJ) has been widely reported to push up the performance of lead-based perovskite solar cells (PSCs) by extending the spectral response. However, the development of integrated perovskite/organic bulk heterojunction solar cells (IPSCs) encounters a bottleneck problem that the poor carrier extraction capability of perovskite and BHJ leads to the severe loss of open-voltage (V oc ) and fill factor (FF). Herein, the strategy of introducing black phosphorous quantum dots (BPQDs) and cuprous oxide (CuO x ) into IPSCs is adopted, which not only successfully extends the single-component PSCs light response to 930 nm, but also significantly reduces the V oc and FF loss of IPSCs. BPQDs with bipolar charge transport and high mobility characteristics improves the electron/hole transport behaviors of perovskite and BHJ films. CuO x with matching energy levels is introduced between BHJ and Spiro-OMeTAD as a buffer layer, which provides good driving force for the transportation of holes. The champion device achieves a power conversion efficiency of 23.52%. The IPSCs devices also display an excellent long-term and humidity stability. This work demonstrates an approach to solve the carrier extraction key issues that limits the performance of IPSCs, which achieves an instructive result in the development of PSCs light management.

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Enhancing charge transport in an organic photoactive layer via vertical component engineering for efficient perovskite/organic integrated solar cells

Abstract: Efficient perovskite/organic integrated solar cells were fabricated via vertical component engineering to enhance charge transport in an organic photoactive layer.

Cited by 25 publications

References 42 publications

Secondary Ion Mass Spectrometry (SIMS) for Chemical Characterization of Metal Halide Perovskites

Secondary Ion Mass Spectrometry (SIMS) for Chemical Characterization of Metal Halide Perovskites

Spatial Distribution Recast for Organic Bulk Heterojunctions for High‐Performance All‐Inorganic Perovskite/Organic Integrated Solar Cells

Light Management through Organic Bulk Heterojunction and Carrier Interfacial Engineering for Perovskite Solar Cells with 23.5% Efficiency

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