Ternary organic solar cells with 16.88% efficiency enabled by a twisted perylene diimide derivative to enhance the open-circuit voltage

Ni, Ming-Yang; Leng, Shifeng; Liu, Heng; Yang, Yankang; Li, Qianhui; Sheng, Chun‐Qi; Lu, Xinhui; Liu, Feng; Wan, Jun‐Hua

doi:10.1039/d0tc05691j

Cited by 27 publications

(26 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It also indicates a better crystalline/mixing domain interface is formed to yield high carrier generation. The mobilities extracted by the space‐charge‐limited‐current (SCLC) method [ 8 ] are shown in Figure 1f. For T‐Mono‐FAs films, balanced and high carrier transport is achieved (T‐C 61 DMI: μ h (hole mobility) / µ e (electron mobility) = 1.25; T‐PC 61 BM: μ h / µ e = 1.28).…”

Section: Resultsmentioning

confidence: 99%

“…Figure 3b shows the hole‐transfer dynamics by the biexponential fit of the ≈590 nm bleach signal. The fast components ( τ 1 ) represent the ultrafast exciton dissociation in the mixing region, [ 8c,11 ] which are ≈0.32, ≈0.25, ≈0.27, ≈0.35, and ≈0.36 ps, for PM6:Y6, T‐CDMI, T‐PCBM, T‐Bis‐PCBM, T‐ICBA. This result corresponds well with the intermolecular distances in the mixing region.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Correlating Electronic Structure and Device Physics with Mixing Region Morphology in High‐Efficiency Organic Solar Cells

et al. 2022

Self Cite

View full text Add to dashboard Cite

The donor/acceptor interaction in non-fullerene organic photovoltaics leads to the mixing domain that dictates the morphology and electronic structure of the blended thin film. Initiative effort is paid to understand how these domain properties affect the device performances on high-efficiency PM6:Y6 blends. Different fullerenes acceptors are used to manipulate the feature of mixing domain. It is seen that a tight packing in the mixing region is critical, which could effectively enhance the hole transfer and lead to the enlarged and narrow electron density of state (DOS). As a result, short-circuit current (J SC ) and fill factor (FF) are improved. The distribution of DOS and energy levels strongly influences open-circuit voltage (V OC ). The raised filling state of electron Fermi level is seen to be key in determining device V OC . Energy disorder is found to be a key factor to energy loss, which is highly correlated with the intermolecular distance in the mixing region. A 17.53% efficiency is obtained for optimized ternary devices, which is the highest value for similar systems. The current results indicate that a delicate optimization of the mixing domain property is an effective route to improve the V OC , J SC , and FF simultaneously, which provides new guidelines for morphology control toward high-performance organic solar cells.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Correlating Electronic Structure and Device Physics with Mixing Region Morphology in High‐Efficiency Organic Solar Cells

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Depending on the target application, the proclivity for PDI to π‐π stack and form large aggregates in the solid‐state may need to be circumvented to enable high performance [22,23] . Thus, to prevent PDI over‐aggregation in the solid‐state, it is possible to synthetically introduce a spacer core in between two or more PDI units [24–41] . These multicomponent PDI materials are highly regarded not only for their capacity to inhibit over‐aggregation, but also enable balanced charge dissociation and isotropic charge transport [23] …”

Section: Introductionmentioning

confidence: 99%

Development of Tetrameric N‐Annulated Perylene Diimides Using “Click” Chemistry

2022

View full text Add to dashboard Cite

Herein, we report the design, synthesis, and characterization of two novel N-annulated perylene diimide (NPDI) tetramer arrays that were developed using copper catalyzed alkyne-azide cycloaddition. Despite the optoelectronic properties of both tetramers being nearly identical, the two tetramers exhibited very different molecular geometries. The twisted spirobifluorene NPDI tetramer (sbfNPDI 4 ) was found to have an extended and flexible geometry, while the planar pyrene NPDI tetramer (pyrNPDI 4 ) exhibited a highly congested and conformationally locked geometry. Organic photovoltaic devices were constructed to demonstrate the use of both new compounds as electron acceptor materials, where slightly higher power conversion efficiencies were achieved with pyrNPDI 4 than sbfNPDI 4 . This study highlights the viability of using "click" chemistry as a facile synthetic strategy towards the development of new multicomponent perylene diimide materials for organic electronic applications.

show abstract

“…Nowadays, most of the highly efficient ternary OSCs have been achieved via the significant improvement of J sc and V oc , attributed to the complementary absorption to expand the coverage of solar spectrum and the matched interfacial contact with suppressed charge recombination loss at ternary heterojunction. [ 19–21 ] However, their FF values are generally below 78%, [ 13,22–25 ] which is much smaller than silicon and perovskite cells. [ 26 ] Recent works have demonstrated that there is much room to promote the device efficiency by improving FF.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Charge Transport and Broad Absorption Enabling Record 18.13% Efficiency of PM6:Y6 Based Ternary Organic Photovoltaics with a High Fill Factor Over 80%

Zeng

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Ternary architecture is an efficient strategy to boost desired power conversion efficiency of single-junction organic solar cells (OSCs). Here, a ternary OSC by incorporating a compatible acceptor ITIC-M as a third component into state-of-the-art PM6:Y6 blend is reported, yielding a power conversion efficiency of 18.13% and an impressive fill factor of 80.10%. The efficiency is the highest record for the PM6:Y6 based ternary devices reported to date. The full advantages of the designed ternary heterojunction are the good complementary light absorption that increases the photocurrent, and the matched interfacial electronic structures featuring so-called pinning energies that facilitate exciton separation and suppress charge recombination loss. Furthermore, ITIC-M plays a vital role in optimizing the micromorphology of the ternary blend with better dispersity, well-formed fibrillar structure and enhanced crystallinity, thus boosting the charge transport and device performance.

show abstract

Ternary organic solar cells with 16.88% efficiency enabled by a twisted perylene diimide derivative to enhance the open-circuit voltage

Abstract: For the high-efficiency PM6:Y6 binary system, there is still space for narrowing the lowest unoccupied molecular orbital (LUMO) level offset (0.36 eV) between PM6 and Y6 to further mitigate energy...

Cited by 27 publications

References 45 publications

Correlating Electronic Structure and Device Physics with Mixing Region Morphology in High‐Efficiency Organic Solar Cells

Correlating Electronic Structure and Device Physics with Mixing Region Morphology in High‐Efficiency Organic Solar Cells

Development of Tetrameric N‐Annulated Perylene Diimides Using “Click” Chemistry

Enhanced Charge Transport and Broad Absorption Enabling Record 18.13% Efficiency of PM6:Y6 Based Ternary Organic Photovoltaics with a High Fill Factor Over 80%

Contact Info

Product

Resources

About