A graphene/ZnO electron transfer layer together with perovskite passivation enables highly efficient and stable perovskite solar cells

Tavakoli, Mohammad Mahdi; Tavakoli, Rouhollah; Yadav, Pankaj; Kong, Jing

doi:10.1039/c8ta10857a

Cited by 148 publications

(118 citation statements)

References 40 publications

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“…These results indicate that the optimum thickness of PDTIDTBT:PC 60 BM is almost 100 nm. Due to high transmittance of the PDTIDTBT, we demonstrate the application of the PDTIDTBT:PC 60 BM blend for the semitransparent OPV by applying CVD graphene on top of the device (31).…”

Section: Resultsmentioning

confidence: 99%

A relatively wide-bandgap and air-stable donor polymer for fabrication of efficient semitransparent and tandem organic photovoltaics

Tavakoli

Pò

Bianchi

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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Organic photovoltaics (OPVs) have attracted tremendous attention in the field of thin-film solar cells due to their wide range of applications, especially for semitransparent devices. Here, we synthesize a dithiaindacenone-thiophene-benzothiadiazole-thiophene alternating donor copolymer named poly{[2,7-(5,5-didecyl-5H-1,8-dithia-as-indacenone)]-alt-[5,5-(5′,6′-dioctyloxy-4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)]} (PDTIDTBT), which shows a relatively wide bandgap of 1.82 eV, good mobility, and high transmittance and ambient stability. In this work, we fabricate an OPV device using monolayer graphene as top electrode. Due to the stability of PDTIDTBT in air and water, we use a wet transfer technique for graphene to fabricate semitransparent OPVs. We demonstrate OPVs based on the PDTIDTBT:Phenyl-C61/71-butyric acid methyl ester (PCBM) blend with maximum power conversion efficiencies (PCEs) of 6.1 and 4.75% using silver and graphene top electrodes, respectively. Our graphene-based device shows a high average visible transmittance (AVT) of 55%, indicating the potential of PDTIDTBT for window application and tandem devices. Therefore, we also demonstrate tandem devices using the PDTIDTBT:Phenyl-C61-butyric acid methyl ester (PC60BM) blend in both series and parallel connections with average PCEs of 7.3 and 7.95%, respectively. We also achieve a good average PCE of 8.26% with an average open circuit voltage (Voc) of 1.79 V for 2-terminal tandem OPVs using this blend. Based on tandem design, an OPV with PCE of 6.45% and AVT of 38% is demonstrated. Moreover, our devices show improved shelf life and ultraviolet (UV) stability (using CdSe/ZnS core shell quantum dots [QDs]) in ambient with 45% relative humidity.

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Section: Resultsmentioning

confidence: 99%

A relatively wide-bandgap and air-stable donor polymer for fabrication of efficient semitransparent and tandem organic photovoltaics

Tavakoli

Pò

Bianchi

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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“…This is because of its lower conduction bandgap when compared with conventional electron-transporting materials such as TiO 2 (Figure 3), while graphene acts as an isolation layer that prevents the reaction between ZnO and perovskite triggered by light. 81,83,96…”

Section: Stability Improvement In Different Layers Of Carbon-based mentioning

confidence: 99%

Carbon‐based perovskite solar cells: From single‐junction to modules

Huang

Chee

et al. 2019

Carbon Energy

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Perovskite solar cells (PSCs) have attracted more and more attention in the scientific community due to their high performance and simple fabrication process.In the past few years, emerging technologies have made manufacturing large-scale PSC modules possible. However, stability and fabrication issues still limit the modularization and commercialization of PSCs. Carbon materials have been widely used in PSCs to overcome these challenges due to their excellent optical, electrical, and mechanical properties. In addition, the hydrophobic properties of certain carbon materials are highly effective at protecting the perovskite film from moisture and improving the stability of PSCs. All these superior properties have made carbon one of the most promising materials to fabricate future highperformance PSC modules with long service lifetimes. In this review, recent developments of carbon-based materials in different layers of single-junction PSCs will first be discussed, with an emphasis on functionalities related to PSCs' stability and modularization. Then, current improvements and future discussions in the manufacturing of monolithic PSC modules will be reviewed in detail.

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“…[1][2][3][4][5][6] Due to the presence of organic compounds such as methylammonium (MA) in the perovskites, these materials have stability issue, especially in a humid environment, hindering their practical applications. [7][8][9][10][11] Fabrication of all inorganic perovskite films such as cesium lead triiodide (CsPbI 3 ) is an effective way to address this issue. Interestingly, it was found that CsPbI 3 perovskite with a black cubic phase has a bandgap of 1.72 eV, which is suitable for optoelectronic devices.…”

Section: Introductionmentioning

confidence: 99%

Efficient Semitransparent CsPbI₃ Quantum Dots Photovoltaics Using a Graphene Electrode

et al. 2019

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Solution‐processed perovskite quantum dots (QDs) are promising candidates for fabrication of semitransparent and tandem solar cells due to the bandgap tunability. In this work, cesium lead triiodide (CsPbI3) QDs are synthesized with a stable cubic phase and efficient perovskite solar cells (PSCs) are fabricated using the ligand exchange technique. Monolayer graphene is grown by chemical vapor deposition technique and a dry process to transfer graphene on top of the device is developed. Based on this approach, an efficient inverted PSC is demonstrated with a high average visible transmittance (AVT). After optimization, PSCs based on silver and graphene electrodes with power conversion efficiencies (PCEs) of 9.6% and 6.8% are achieved, respectively. Additionally, by tuning the thickness of the active layer, a PSC with PCE of 4.95% and AVT of 53% is demonstrated, indicating the potential of CsPbI3 QDs for the fabrication of semitransparent devices applicable in windows.

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A graphene/ZnO electron transfer layer together with perovskite passivation enables highly efficient and stable perovskite solar cells

Abstract: Interface engineering in organometal halide perovskite solar cells (PSCs) has been an efficient tool to boost the performance and stability of photovoltaic (PV) devices.

Cited by 148 publications

References 40 publications

A relatively wide-bandgap and air-stable donor polymer for fabrication of efficient semitransparent and tandem organic photovoltaics

A relatively wide-bandgap and air-stable donor polymer for fabrication of efficient semitransparent and tandem organic photovoltaics

Carbon‐based perovskite solar cells: From single‐junction to modules

Efficient Semitransparent CsPbI₃ Quantum Dots Photovoltaics Using a Graphene Electrode

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A graphene/ZnO electron transfer layer together with perovskite passivation enables highly efficient and stable perovskite solar cells

Abstract: Interface engineering in organometal halide perovskite solar cells (PSCs) has been an efficient tool to boost the performance and stability of photovoltaic (PV) devices.

Cited by 148 publications

References 40 publications

A relatively wide-bandgap and air-stable donor polymer for fabrication of efficient semitransparent and tandem organic photovoltaics

A relatively wide-bandgap and air-stable donor polymer for fabrication of efficient semitransparent and tandem organic photovoltaics

Carbon‐based perovskite solar cells: From single‐junction to modules

Efficient Semitransparent CsPbI3 Quantum Dots Photovoltaics Using a Graphene Electrode

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Product

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Efficient Semitransparent CsPbI₃ Quantum Dots Photovoltaics Using a Graphene Electrode