Regulating Phase Separation Kinetics for High‐Efficiency and Mechanically Robust All‐Polymer Solar Cells

Wang, Jianqiu; Xian, Kaihu; Qiao, Jiawei; Chen, Zhihao; Bi, Pengqing; Zhang, Tao; Zheng, Zhong; Xin, Hao; Ye, Long; Zhang, Shaoqing; Hou, Jianhui

doi:10.1002/adma.202305424

Cited by 26 publications

(8 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shorter τ 1 and τ 2 values indicate a faster diffusion rate of excitons toward the interface before dissociation and a more rapid exciton dissociation at the D/A interface. These findings illustrate that the treatment of DIO accelerates the hole transfer kinetics, boosting the photogenerated current and thereby enhancing the photovoltaic performance of the all-PSCs. ,− …”

Section: Resultsmentioning

confidence: 80%

Morphology Control Realizes Fast Charge Dissociation and Transport in High-Performance All-Polymer Solar Cells

Zhao,

Wu,

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

The difficulty in controlling the morphology of the active layer is a major factor for hindering the improvement of photovoltaic performance in all-polymer solar cells (all-PSCs). Here, we introduced two kinds of high-boiling-point solvent additives, 1,8-diiodooctane (DIO) and 1-chloronaphthalene (CN), to control the donor/acceptor blends, thereby improving the film formation and crystallization kinetics and molecular orientation of the active layer in all-PSCs. In this study, the effectiveness of high-boiling-point solvent additives in controlling the morphology of the active layer is examined. Moreover, it was found that the selectivity of additives affected the photovoltaic performance in all-PSCs, and improper additives could significantly reduce the power conversion efficiencies (PCEs). Through using an all-polymer system with D18-Cl as the polymer donor and PY-IT as the polymer acceptor, the CN-treated device exhibited poor PCE, while those employing DIO significantly improved the phase separation morphology of the active layer, resulting in an impressive PCE of 16.0%. Importantly, the DIO-treated device in the D18-Cl:PY-IT system could realize the faster charge dissociation and transport as well as lower bimolecular recombination. Furthermore, the corresponding devices exhibited excellent storage stability, retaining over 80% of their initial efficiency after 3000 h in a nitrogen-atmosphere glovebox, which was potentially beneficial for the future commercial application.

show abstract

Section: Resultsmentioning

confidence: 80%

Morphology Control Realizes Fast Charge Dissociation and Transport in High-Performance All-Polymer Solar Cells

Zhao,

Wu,

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…To date, many halogenated polymer donors‐based all‐PSCs have achieved a PCE more than 17 % (Figure 1a). The halogenated polymer donors includes D18, [10] D18‐Cl, [11] PQM‐Cl, [12] PBQx‐TF, [13] PDBQx‐TCl, [14] PBBTz‐Cl, [15] PM6, [16] etc. These polymer donors possess deep‐lying HOMO energy level and strong molecular stacking, contributing to high PCEs.…”

Section: Introductionmentioning

confidence: 99%

Dithienoquinoxalineimide‐Based Polymer Donor Enables All‐Polymer Solar Cells Over 19 % Efficiency

Wang,

et al. 2024

Angew Chem Int Ed

View full text Add to dashboard Cite

All‐polymer solar cells (all‐PSCs) have been regarded as one of the most promising candidates for commercial applications owing to their outstanding advantages such as mechanical flexibility, light weight and stable film morphology. However, compared to large amount of new‐emerging excellent polymer acceptors, the development of high‐performance polymer donor lags behind. Herein, a new D‐π‐A type polymer donor, namely QQ1, was developed based on dithienoquinoxalineimide (DTQI) as the A unit, benzodithiophene with thiophene‐conjugated side chains (BDTT) as the D unit, and alkyl‐thiophene as the π‐bridge, respectively. QQ1 not only possesses a strong dipole moment, but also shows a wide bandgap of 1.80 eV and a deep HOMO energy level of ‐5.47 eV, even without halogen substituents that are commonly indispensable for high‐performance polymer donors. When blended with a classic polymer acceptor PY‐IT, the QQ1‐based all‐PSC delivers an outstanding PCE of 18.81%. After the introduction of F‐BTA3 as the third component, a record PCE of 19.20% was obtained, the highest value reported so far for all‐PSCs. The impressive photovoltaic performance originates from broad absorption range, reduced energy loss, and compact π‐π stacking. These results provide new insight in the rational design of novel nonhalogenated polymer donors for further development of all‐PSCs.

show abstract

“…All-polymer solar cells (APSCs), which utilize a physical blend of pand n-type polymers as the photoactive layer, are a subtype of organic PVs gaining traction for IPV applications, offering superior mechanical stability and morphological durability [9]. Although APSCs have been extensively researched in outdoor applications [10][11][12][13][14][15], their applications in indoor photovoltaic applications still lag. Although a few studies have demonstrated high V OC and PCE in APSCs tailored for IPV applications, these investigations show the potential of APSCs as efficient and durable IPV solutions [16].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Transport Carrier Free All-Polymer Solar Cells for Indoor Applications: TCAD Simulation under White LED Illumination

Salem,

Okil,

Shaker

et al. 2024

Polymers

View full text Add to dashboard Cite

This work inspects the utilization of all-polymer solar cells (APSCs) in indoor applications under LED illumination, with a focus on boosting efficiency through simulation-based design. The study employs a SCAPS TCAD device simulator to investigate the performance of APSCs under white LED illumination at 1000 lux, with a power density of 0.305 mW/cm2. Initially, the simulator is validated against experimental results obtained from a fabricated cell utilizing CD1:PBN-21 as an absorber blend and PEDOT:PSS as a hole transportation layer (HTL), where the initial measured efficiency is 16.75%. The simulation study includes an examination of both inverted and conventional cell structures. In the conventional structure, where no electron transportation layer (ETL) is present, various materials are evaluated for their suitability as the HTL. NiO emerges as the most promising HTL material, demonstrating the potential to achieve an efficiency exceeding 27%. Conversely, in the inverted configuration without an HTL, the study explores different ETL materials to engineer the band alignment at the interface. Among the materials investigated, ZnS emerges as the optimal choice, recording an efficiency of approximately 33%. In order to reveal the efficiency limitations of these devices, the interface and bulk defects are concurrently investigated. The findings of this study underscore the significance of careful material selection and structural design in optimizing the performance of APSCs for indoor applications.

show abstract

Regulating Phase Separation Kinetics for High‐Efficiency and Mechanically Robust All‐Polymer Solar Cells

Cited by 26 publications

References 52 publications

Morphology Control Realizes Fast Charge Dissociation and Transport in High-Performance All-Polymer Solar Cells

Morphology Control Realizes Fast Charge Dissociation and Transport in High-Performance All-Polymer Solar Cells

Dithienoquinoxalineimide‐Based Polymer Donor Enables All‐Polymer Solar Cells Over 19 % Efficiency

Optimizing Transport Carrier Free All-Polymer Solar Cells for Indoor Applications: TCAD Simulation under White LED Illumination

Contact Info

Product

Resources

About