Review on Tailoring PEDOT:PSS Layer for Improved Device Stability of Perovskite Solar Cells

Xia, Yijie; Yan, Guowang; Lin, Jian

doi:10.3390/nano11113119

Cited by 48 publications

(28 citation statements)

References 111 publications

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“…Typically conventional PEDOT:PSS as an interlayer is known to be hygroscopic and likely to introduce poor device stability, this instability is commonly attributed to the PSS counterion. [ 51 ] However, stability testing demonstrates the commercially available HTL Solar 3 PEDOT, which uses an alternative sulfonated block co‐polymer [ 52 ] to PSS, when used in the PEDOT/carbon system counteracts any prior instabilities observed. PEDOT/carbon and PEDOT/gold devices with no encapsulation under 70%RH (relative humidity)/25 °C conditions have long‐term stability of 80% retained efficiency over 1000 h compared to the conventional spiro‐MeOTAD samples that lost 50% of their efficiency over the same time scale (Figure 3d).…”

Section: Resultsmentioning

confidence: 99%

All‐Printed Roll‐to‐Roll Perovskite Photovoltaics Enabled by Solution‐Processed Carbon Electrode

et al. 2023

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Perovskite photovoltaics have shown great promise in device efficiency but also the promise of scalability through solution‐processed manufacture. Efforts to scale perovskites have been taken through printable mesoporous scaffolds and slot die coating of flexible substrates roll‐to‐roll (R2R). However, to date there has been no demonstration of entirely R2R‐coated devices due to the lack of a compatible solution‐processable back electrode; instead, high‐value evaporated metal contacts are employed as a post process. Here, in this study, the combination of a low‐temperature device structure and R2R‐compatible solution formulations is employed to make a fully R2R printable device architecture overcoming interlayer incompatibilities and recombination losses. Therefore, the n–i–p device structure of SnO2/perovskite/poly(3,4‐ethylenedioxythiophene)/carbon is employed to form an ohmic contact between a p‐type semiconductor and printable carbon electrode. In particular, the results show that the small‐scale device efficiencies of 13–14% are achieved, matching the device performance of evaporated gold electrodes. Also, this entirely R2R‐coated perovskite prototype represents a game changer, reaching over 10% (10.8) stabilized power conversion efficiency with unencapsulated long‐term stability retaining 84% of its original efficiency over 1000 h under 70% RH and 25 °C.

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Section: Resultsmentioning

confidence: 99%

All‐Printed Roll‐to‐Roll Perovskite Photovoltaics Enabled by Solution‐Processed Carbon Electrode

et al. 2023

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“…Suitable carrier transporting materials feature high μ and the ability to form favorable energy alignment and trap-free interfaces with their adjacent layers. For example, spiro-OMeTAD, spiro-TTB, PEDOT:PSS, NiO x , and PTAA are commonly used HTL materials; TiO 2 , PCBM, C60, ZnO nanoparticles, PFN-Br, and TPBi are often used as ETL materials. However, metal oxide, nanoparticle, and small-organic-molecule thin films lack suitable mechanical stretchability for wearable applications.…”

Section: Discussionmentioning

confidence: 99%

Heterostructure Engineering of Solution-Processable Semiconductors for Wearable Optoelectronics

Kim

Seong

Gong

2023

ACS Appl. Electron. Mater.

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Wearable and implantable optoelectronics, including light-emitting diodes (LEDs), photovoltaics (PVs), and photodetectors (PDs), have recently gained great interest for their potential applications in wearable technology, the Internet of things (IoT), and personalized healthcare. The development of optoelectronics with superior mechanical deformability (i.e., stretchability) is highly desired, as such devices can be worn seamlessly on the body, enabling noninvasive, continuous, and accurate real-time health monitoring using light. However, conventional optoelectronics build on inorganic semiconductors with high rigidity and brittleness. The lack of mechanical deformability impedes the reliable acquisition of biosignals during the motion of the human body, hindering the biomedical application of optoelectronics. Innovative design for intrinsically stretchable optoelectronics is thus urgently needed. This Spotlight identifies strategies and advances in intrinsically stretchable optoelectronics. We focus on heterostructure engineering, which can effectively impart softness in solution-processable optoelectronic semiconductors, including organic semiconductors (OSCs), colloidal quantum dots (CQDs), and metal halide perovskites (MHPs). Lastly, we propose a roadmap for future stretchable optoelectronics research toward its practical application in healthcare, renewable energy, soft robotics, and beyond.

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“…Recently, instead of neat PEDOT:PSS, modified PEDOT:PSS with other functional materials has been widely investigated because of its efficient anode contact formation in PSCs [ 19 , 20 ]. Doping of PEDOT:PSS is an effective method to adjust electronic properties.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in Power Conversion Efficiency of Perovskite Solar Cells by Reduced Non-Radiative Recombination Using a Brij C10-Mixed PEDOT:PSS Hole Transport Layer

et al. 2023

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Interface properties between charge transport and perovskite light-absorbing layers have a significant impact on the power conversion efficiency (PCE) of perovskite solar cells (PSCs). Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a polyelectrolyte composite that is widely used as a hole transport layer (HTL) to facilitate hole transport from a perovskite layer to an anode. However, PEDOT:PSS must be modified using a functional additive because PSCs with a pristine PEDOT:PSS HTL do not exhibit a high PCE. Herein, we demonstrate an increase in the PCE of PSCs with a polyethylene glycol hexadecyl ether (Brij C10)-mixed PEDOT:PSS HTL. Photoelectron spectroscopy results show that the Brij C10 content becomes significantly high in the HTL surface composition with an increase in the Brij C10 concentration (0–5 wt%). The enhanced PSC performance, e.g., a PCE increase from 8.05 to 11.40%, is attributed to the reduction in non-radiative recombination at the interface between PEDOT:PSS and perovskite by the insulating Brij C10. These results indicate that the suppression of interface recombination is essential for attaining a high PCE for PSCs.

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Review on Tailoring PEDOT:PSS Layer for Improved Device Stability of Perovskite Solar Cells

Cited by 48 publications

References 111 publications

All‐Printed Roll‐to‐Roll Perovskite Photovoltaics Enabled by Solution‐Processed Carbon Electrode

All‐Printed Roll‐to‐Roll Perovskite Photovoltaics Enabled by Solution‐Processed Carbon Electrode

Heterostructure Engineering of Solution-Processable Semiconductors for Wearable Optoelectronics

Enhancement in Power Conversion Efficiency of Perovskite Solar Cells by Reduced Non-Radiative Recombination Using a Brij C10-Mixed PEDOT:PSS Hole Transport Layer

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