Synergetic Strategy for Highly Efficient and Super Flexible Thick‐film Organic Solar Cells (Adv. Energy Mater. 31/2022)

Wang, Jianxiao; Han, Chenyu; Han, Jianhua; Bi, Fuzhen; Sun, Xiaokang; Wen, Shuguang; Yang, Chunpeng; Yang, Chunming; Bao, Xichang; Chu, Junhao

doi:10.1002/aenm.202270136

Cited by 13 publications

(12 citation statements)

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“…Then crack‐onset‐strain (COS) as another important figure‐of‐merit for all‐polymer blend is evaluated, which represents the film ductility. [ 42–47 ] As presented in Figure 1d and Table S1 (Supporting Information), the strain‐stress curves of all‐polymer blends are presented in Figure d and their derived COS and mechanical toughness values are listed in Table S1 (Supporting Information). It was found that the proper addition of PTQ10 could significantly boost the ductility of active layers in this work.…”

Section: Resultsmentioning

confidence: 99%

Unveiling the Morphological and Physical Mechanism of Burn‐in Loss Alleviation by Ternary Matrix Toward Stable and Efficient All‐Polymer Solar Cells

Fan

Peña

et al. 2023

Advanced Materials

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All‐polymer solar cells (All‐PSCs) are considered the most promising candidate in achieving both efficient and stable organic photovoltaic devices, yet the field has rarely presented an in‐depth understanding of corresponding device stability while efficiency is continuously boosted via the innovation of polymer acceptors. Herein, a ternary matrix is built for all‐PSCs with optimized morphology, improved film ductility and importantly, boosted efficiency and better operational stability than its parental binary counterparts, as a platform to study the underlying mechanism. The target system PQM‐Cl:PTQ10:PY‐IT (0.8:0.2:1.2) exhibits an alleviated burn‐in loss of morphology and efficiency under light soaking, which supports its promoted device lifetime. The comprehensive characterizations of fresh and light‐soaked active layers lead to a clear illustration of opposite morphological and physical degradation direction of PQM‐Cl and PTQ10, thus resulting in a delicate balance at the optimal ternary system. Specifically, the enlarging tendency of PQM‐Cl and shrinking preference of PTQ10 in terms of phase separation leads to a stable morphology in their mixing phase; the hole transfer kinetics of PQM‐Cl:PY‐IT host is stabilized by incorporating PTQ10. This work succeeds in reaching a deep insight into all‐PSC's stability promotion by a rational ternary design, which booms the prospect of gaining high‐performance all‐PSCs.

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Section: Resultsmentioning

confidence: 99%

Unveiling the Morphological and Physical Mechanism of Burn‐in Loss Alleviation by Ternary Matrix Toward Stable and Efficient All‐Polymer Solar Cells

Fan

Peña

et al. 2023

Advanced Materials

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“…Interestingly, numerous published results indicate the high flexible properties of fullerene free PM6:Y12 BHJ semiconducting polymers. [ 91–94 ] Therefore, in order to better understand if the mechanical tests are explaining OPD's degradation, we fabricated and tested a new OPD under similar processing and operating conditions (i.e., biased at −1.7 V and 10 mW cm −2 white light illumination) and have recorded the J d and the J ph values every 15 min under non‐bending conditions in ambient air. The J d and J ph values recorded for the first measurement were 1.18 and 186 µA cm −2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Extensive Properties Investigation of AgNWs‐PEDOT:PSS Based Transparent Conductive Electrode for Ultraflexible Organic Photodetector Applications

Dcosta,

Ochoa,

Sanaur

2023

Adv Elect Materials

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In this work, the optoelectrical, mechanical, and material properties of silver nanowires/poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (AgNWs‐PEDOT:PSS) hybrid electrode, solution processed on 5 µm parylene‐C substrate for ultraflexible organic photodetector (OPD) applications, are investigated. The fabricated transparent conductive hybrid electrode exhibits low sheet resistance (Rs) of 27 Ω Sq.−1 and shows an average optical transmission of 90% in the visible spectrum. Besides the comparable work function (WF) of 5 eV when compared with the standard indium tin oxide (ITO) electrode, the surface root mean square (RMS) roughness of the hybrid electrode is effectively reduced from 8 nm to 4 nm by spin coating a planarization layer of PEDOT:PSS. With a stable value in the relative change in resistance over continuous 50 k bending cycles at a curvature radius of 0.1 mm, the hybrid electrode exhibits excellent mechanical characteristics. Finally, using this hybrid electrode it is shown that an ultraflexible OPD fabricated in ambient atmospheric conditions demonstrates current density to voltage (J–V) characteristics comparable with standard ITO‐based OPD. Further, the ultraflexible OPD can withstand more than 5 k continuous bending cycles with similar J–V characteristics before and after bending.

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“…The thick active layer also weakens the strength of internal electric field, which is apparently unfavorable to the photocharge collection. [9,10] Together with the longer charge transport distance to electrode and the imbalanced charge mobility, the thick active layer device demonstrates more severe charge recombination than the 100 nm active layer device. [9,11] To overcome the limitations of reduced photocharge generation and collection in thick BHJ film OSCs, it is rational to put forward a strategy that can simultaneously optimize the exciton splitting efficiency and the internal electric field.…”

Section: Introductionmentioning

confidence: 99%

Solid Solvation Assisted Electrical Doping Conserves High‐Performance in 500 nm Active Layer Organic Solar Cells

Xue

Liang

Tang

et al. 2023

Adv Funct Materials

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Organic solar cells (OSCs) process fascinating solution‐printing capability to achieve low‐cost and large‐scale manufacture. However, the rapid power conversion efficiency (PCE) decay with active layer thickness enlargement inhibits the implement of OSCs’ potential advantages. To overcome the bottlenecks of PCE decay in thick active layer OSCs, the electrical doping with componential selectivity in bulk heterojunction (BHJ) film is achieved by introducing a solid solvation additive. Benefiting from the higher exciton splitting efficiency together with the longer drift (Ldr) and diffusion (Ldiff) lengths, an OSC with 100 nm BHJ film demonstrates a PCE increment from 16.44% to 18.24% with prolonged dark and illuminated storage stabilities. Applying the solid solvation assisted (SSA) doping method in the OSCs with 500 nm active layer, the PCE significantly increases by 31.9%, from the original value of 11.79% to 15.55%. It further improves to 15.84% in a ternary blend thick‐film device, which is the record value to the best of our knowledge. Besides, the SSA doping narrows the PCE gap between the 0.04 and 1 cm2 devices. All improvements demonstrate the great potential of SSA doping for OSC commercial manufacture, since it optimizes the photovoltaic performance under all practical conditions of long‐term, thick‐film, and large‐area.

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Synergetic Strategy for Highly Efficient and Super Flexible Thick‐film Organic Solar Cells (Adv. Energy Mater. 31/2022)

Cited by 13 publications

References 0 publications

Unveiling the Morphological and Physical Mechanism of Burn‐in Loss Alleviation by Ternary Matrix Toward Stable and Efficient All‐Polymer Solar Cells

Unveiling the Morphological and Physical Mechanism of Burn‐in Loss Alleviation by Ternary Matrix Toward Stable and Efficient All‐Polymer Solar Cells

Extensive Properties Investigation of AgNWs‐PEDOT:PSS Based Transparent Conductive Electrode for Ultraflexible Organic Photodetector Applications

Solid Solvation Assisted Electrical Doping Conserves High‐Performance in 500 nm Active Layer Organic Solar Cells

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