Low temperature based PDINO cathode interlayer for high operational photostable inverted non-fullerene organic solar cells

Moustafa, Enas; Méndez, Marı́a; Pallarès, Josep; Marsal, Lluís F.

doi:10.1016/j.solmat.2022.111985

Cited by 14 publications

(27 citation statements)

References 86 publications

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“…In contrast to the pristine devices, which have a higher low‐frequency arc as well as higher leakage current (Figure 3a) and lower J SC values, indicating their drop performance behavior (Table 1). Same behavior was observed in our previous reported work [ 33,100 ] as well as Upama et al. [ 23 ]…”

Section: Resultssupporting

confidence: 91%

“…In contrast to the pristine devices, which have a higher low-frequency arc as well as higher leakage current (Figure 3a) and lower J SC values, indicating their drop performance behavior (Table 1). Same behavior was observed in our previous reported work [33,100] as well as Upama et al [23] Another important consideration in short circuit conditions (Figure S15b, Supporting Information), as the Pre-TT based devices showed lower Z´ (real part-X axis) -Z´´ (imaginary part-Y axis) values than the pristine based ones. It indicates that the Pre-TT devices show rapid charge extraction, in contrast to the pristine ones, which contributes to the J SC values of the devices which are highly consistent with the results of the J-V characteristics (listed in Table 1) and the previously discussed photo-physics measurements (Figure 4) as well as the performed optical analysis (Figure 3), revealing that the improvement of the J SC of the Pre-TT devices has the main contribution to the PCE enhancement.…”

Section: Impedance Spectroscopysupporting

confidence: 87%

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Thermal Activation of PEDOT:PSS/PM6:Y7 Based Films Leads to Unprecedent High Short‐Circuit Current Density in Nonfullerene Organic Photovoltaics

Moustafa

Méndez

Sánchez

et al. 2022

Advanced Energy Materials

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Finding an effective approach to suppress trap formation is a potential route for enhancing the performance of nonfullerene organic photovoltaic (NF‐OPVs) devices. Here, an extraordinary short‐circuit current density (JSC) value of 32.65 mA cm‐2 is achieved, higher than the state‐of‐the art NF‐OPVs reported, reaching a high power conversion efficiency (PCE) of 17.92%. This remarkable enhancement is exhibited through the fine‐tuning of PEDOT:PSS/PM6:Y7 films and interface morphologies via applying the prethermal treatment approach (Pre‐TT) to the devices, which exhibit JSC and PCE enhancement of 21% and 8%, respectively, compared to the pristine devices. Accordingly, the dependence of the JSC upon the Pre‐TT approach through a range of morphological, optical, electrical, and advanced transient measurements is investigated. The Pre‐TT‐based films are found to possess optimal smooth blend morphology with better dispersity owing to reduced domain size. Moreover, the measurements show that the optimized treated devices present higher exciton dissociation probabilities and generation rate of the free charge carriers, showing an ideal balanced electron/hole mobility that reveals the JSC and PCE enhancement. Hence, Pre‐TT approach provides a facile passivation strategy that reduces the trap state density of the blend film, improves interface charge transfer, allows balanced electron/hole mobility, and thus promotes device performance.

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Section: Resultssupporting

confidence: 91%

Section: Impedance Spectroscopysupporting

confidence: 87%

Thermal Activation of PEDOT:PSS/PM6:Y7 Based Films Leads to Unprecedent High Short‐Circuit Current Density in Nonfullerene Organic Photovoltaics

Moustafa

Méndez

Sánchez

et al. 2022

Advanced Energy Materials

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“…To evaluate the photovoltaic properties of the new acceptor TTNC, OPV devices were fabricated adopting a conventional device architecture of ITO/poly(3,4-ethylenedioxythiopene):poly(styrenesulfonate) (PEDOT:PSS)/active layer/perylene diimide functionalized with amino N-oxide (PDINO)/Al, where PDINO is an efficient cathode interlayer for efficient charge extraction and reducing recombination losses. 49,50 In the active layer, PBDB-T was chosen as the donor to match TTNC for better comparison with PBDB-T:TTIC based devices. 51 Varied processing conditions, such as donor/acceptor (D/A) weight ratio (w/w), different additives and ratios were systematically investigated.…”

Section: Photovoltaic Performancementioning

confidence: 99%

A nonfullerene acceptor with π-conjugation extended end groups to achieve enhanced photovoltaic performance

Liu

et al. 2023

New J. Chem.

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“…At present, amine-derivative cathode buffer materials such as NDIN, PDIN, PDINO, PDINN, and PFN-Br are booming. [40][41][42][43] There are few studies on the design strategy of anode interface layer materials, so further understanding is needed. In the past few decades, PEDOT: PSS has been widely used as the anode buffer layer due to its excellent mechanical durability and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Molecular Orientation‐Dependent Exciton Separation in Optimized Single‐Component Y6 Organic Solar Cells

et al. 2023

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The excitons are generally decomposed into free charges by the heterojunction due to the low dielectric constant of organic materials. Recent research indicates that owing to the low exciton binding energy, the pure Y6 film can directly and spontaneously generate free charge carriers after photoexcitation, even without the assistance of the donor/acceptor interface driving force. However, the serious bimolecular recombination and trap‐assisted recombination also limit the photovoltaic efficiency of single‐component Y6 devices. Herein, efficient exciton separation and charge collection by changing the buffer layer and using mixed solvents to control the active layer morphology of single‐component devices based on Y6 are achieved. It is found that the short‐circuit current is significantly increased by properly adjusting the proportion of face‐on and edge‐on direction of molecules. Eventually, the power conversion efficiency (PCE) of single‐component devices based on Y6 is increased from 0.15% to 1.41%. The corresponding dynamic process is revealed by ultrafast transient absorption spectroscopy and entropy effect on the exciton dissociation. Effective charge separation and collection in single‐component devices is not only critical to improving the PCE, but provides an in‐depth understanding for the further design of high‐performance multicomponent devices.

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Low temperature based PDINO cathode interlayer for high operational photostable inverted non-fullerene organic solar cells

Cited by 14 publications

References 86 publications

Thermal Activation of PEDOT:PSS/PM6:Y7 Based Films Leads to Unprecedent High Short‐Circuit Current Density in Nonfullerene Organic Photovoltaics

Thermal Activation of PEDOT:PSS/PM6:Y7 Based Films Leads to Unprecedent High Short‐Circuit Current Density in Nonfullerene Organic Photovoltaics

A nonfullerene acceptor with π-conjugation extended end groups to achieve enhanced photovoltaic performance

Molecular Orientation‐Dependent Exciton Separation in Optimized Single‐Component Y6 Organic Solar Cells

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