Polymer-Entangled Spontaneous Pseudo-Planar Heterojunction for Constructing Efficient Flexible Organic Solar Cells

Zhang, Jiayou1; Mao, Houdong2; Zhou, Kangkang3; Zhang, Lifu1; Luo, Dou4; Wang, Pei1; Ye, Long3; Chen, Yiwang1,2,5

2023-12-01

10.1002/adma.202309379

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

["Flexible organic solar cells (FOSCs) have attracted considerable attention from researchers as promising portable power sources for wearable electronic devices. However, insufficient power conversion efficiency (PCE), intrinsic stretchability, and mechanical stability of FOSCs remain severe obstacles to their application. Herein, an entangled strategy is proposed for the synergistic optimization of PCE and mechanical properties of FOSCs through green sequential printing combined with polymer-induced spontaneous gradient heterojunction phase separation morphology. Impressively, the toughened-pseudo-planar heterojunction (Toughened-PPHJ) film exhibits excellent tensile properties with a crack onset strain (COS) of 11.0%, twice that of the reference bulk heterojunction (BHJ) film (5.5%), which is among the highest values reported for the state-of-the-art polymer/small molecule-based systems. Finite element simulation of stress distribution during film bending confirms that Toughened-PPHJ film can release residual stress well. Therefore, this optimal device shows a high PCE (18.16%) with enhanced (short-circuit current density) JSC and suppressed energy loss, which is a significant improvement over the conventional BHJ device (16.99%). Finally, the 1 cm2 flexible Toughened-PPHJ device retains more than 92% of its initial PCE (13.3%) after 1000 bending cycles. This work provides a feasible guiding idea for future flexible portable power supplies.","The entangled strategy for manipulating the vertical gradient distribution is proposed to trade-off the efficiency and mechanical properties of flexible organic solar cells. The toughened-pseudo planar heterojunction (Toughened-PPHJ) film exhibits excellent tensile resistance, with twice the crack onset strain of the bulk heterojunction (BHJ) film (11.0%/5.5%). Meanwhile, the efficiency of Toughened-PPHJ device is 18.16%, significantly better than BHJ device (16.99%).image"]

crack onset strain flexible organic solar cells mechanical stability pseudo-planar heterojunction sequential blade-coating

SCI ; EI

英语

NI论文

其他

National Natural Science Foundation of China[52303232]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001114728200001

WILEY-V C H VERLAG GMBH

MATERIALS SCIENCE

2-s2.0-85178882942

Web of Science

1.Jiangxi Normal Univ, Natl Engn Res Ctr Carbohydrate Synth, Key Lab Fluorine & Silicon Energy Mat & Chem, Minist Educ, 99 Ziyang Ave, Nanchang 330022, Peoples R China
2.Nanchang Univ, Inst Polymers & Energy Chem IPEC, Jiangxi Prov Key Lab New Energy Chem, 999 Xuefu Ave, Nanchang 330031, Peoples R China
3.Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Sch Mat Sci & Engn, Tianjin Key Lab Mol Optoelect Sci, Tianjin 300350, Peoples R China
4.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
5.Peking Univ, Yangtze Delta Inst Optoelect, Nantong 226010, Peoples R China

Zhang, Jiayou,Mao, Houdong,Zhou, Kangkang,et al. Polymer-Entangled Spontaneous Pseudo-Planar Heterojunction for Constructing Efficient Flexible Organic Solar Cells[J]. ADVANCED MATERIALS,2023,36(7).

Zhang, Jiayou.,Mao, Houdong.,Zhou, Kangkang.,Zhang, Lifu.,Luo, Dou.,...&Chen, Yiwang.(2023).Polymer-Entangled Spontaneous Pseudo-Planar Heterojunction for Constructing Efficient Flexible Organic Solar Cells.ADVANCED MATERIALS,36(7).

Zhang, Jiayou,et al."Polymer-Entangled Spontaneous Pseudo-Planar Heterojunction for Constructing Efficient Flexible Organic Solar Cells".ADVANCED MATERIALS 36.7(2023).