Alloy-like ternary polymer solar cells with over 17.2% efficiency

An, Qiaoshi; Wang, Jian; Gao, Wei; Hu, Zhenghao; Gao, Jinhua; Xu, Chuanfu; Hao, Ming; Zhang, Xiaoli; Yang, Chuluo; Zhang, Fujun

doi:10.1016/j.scib.2020.01.012

Cited by 266 publications

(183 citation statements)

References 70 publications

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“…The gradually increased FFs can be further explained from the monotonously decreased R S and increased R SH of OSCs along with MF1 content increase in acceptors. [ 26–28 ]…”

Section: Resultsmentioning

confidence: 99%

Over 15.7% Efficiency of Ternary Organic Solar Cells by Employing Two Compatible Acceptors with Similar LUMO Levels

Yang

Gao

et al. 2020

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Efficient organic solar cells (OSCs) are fabricated using polymer PM6 as donor, and IPTBO‐4Cl and MF1 as acceptors. The power conversion efficiency (PCE) of IPTBO‐4Cl based and MF1 based binary OSCs individually arrive to 14.94% and 12.07%, exhibiting markedly different short circuit current density (JSC) of 23.18 mA cm−2 versus 17.01 mA cm−2, fill factor (FF) of 72.17% versus 78.18% and similar open circuit voltage (VOC) of 0.893 V versus 0.908 V. The two acceptors, IPTBO‐4Cl and MF1, have similar lowest unoccupied molecular orbital levels, which is beneficial for efficient electron transport in the ternary active layer. The PCE of optimized ternary OSCs arrives to 15.74% by incorporating 30 wt% MF1 in acceptors, resulting from the simultaneously increased JSC of 23.20 mA cm−2, VOC of 0.897 V, and FF of 75.64% in comparison with IPTBO‐4Cl based binary OSCs. The gradually increased FFs of ternary OSCs indicate the well‐optimized phase separation and molecular arrangement with MF1 as morphology regulator. This work may provide a new viewpoint for selecting an appropriate third component to achieve efficient ternary OSCs from materials and photovoltaic parameters of two binary OSCs.

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“…The gradually increased FFs can be further explained from the monotonously decreased R S and increased R SH of OSCs along with MF1 content increase in acceptors. [ 26–28 ]…”

Section: Resultsmentioning

confidence: 99%

Over 15.7% Efficiency of Ternary Organic Solar Cells by Employing Two Compatible Acceptors with Similar LUMO Levels

Yang

Gao

et al. 2020

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“…Recently, a new NFA semiconductor abbreviated as Y6 was reported to yield a breakthrough PCE of over 16% in combination with a polymer donor named PM6. [11,[25][26][27][28] The PM6:Y6 blend exhibits barrierless free charge generation with low recombination, regardless of excitation energy, rendering it a high-performance binary system. [29] In this work, we incorporated a second donor DRTB-T-C4 into the host PM6:Y6 blend to construct ternary OSCs and obtained a very impressive PCE of 17.13% with a V oc of 0.85 V, a J sc of 24.79 mA cm −2 , and an FF of 0.813.…”

Section: Doi: 101002/adma202002344mentioning

confidence: 99%

Enhanced and Balanced Charge Transport Boosting Ternary Solar Cells Over 17% Efficiency

et al. 2020

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Ternary architecture is one of the most effective strategies to boost the power conversion efficiency (PCE) of organic solar cells (OSCs). Here, an OSC with a ternary architecture featuring a highly crystalline molecular donor DRTB‐T‐C4 as a third component to the host binary system consisting of a polymer donor PM6 and a nonfullerene acceptor Y6 is reported. The third component is used to achieve enhanced and balanced charge transport, contributing to an improved fill factor (FF) of 0.813 and yielding an impressive PCE of 17.13%. The heterojunctions are designed using so‐called pinning energies to promote exciton separation and reduce recombination loss. In addition, the preferential location of DRTB‐T‐C4 at the interface between PM6 and Y6 plays an important role in optimizing the morphology of the active layer.

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“…[ 12 ] In addition, the alloy‐like morphology utilized by An et al comprised MF1 and Y6 and increased the photon absorption capacity and charge mobility of the device, achieving a photoelectric conversion performance of 17.22%. [ 13 ] Despite these efforts, ternary blending strategies remain relatively unexplored.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Performance and Stability Improvement of Ternary Polymer Solar Cells Enabled by Modulating the Molecular Packing of Acceptors

Yan

et al. 2020

Solar RRL

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Nanoscale morphology of the active layer plays a crucial role in the power conversion efficiency (PCE) and stability of polymer solar cells (PSCs). Blending the photoactive layer with a third component to produce a ternary system is considered a reliable approach to tune the nanomorphology, thereby improving the device performance. Herein, poly[(2,6‐(4,8‐bis(5‐(2‐ethylhexyl)thiophen‐2‐yl)benzo[1,2‐b:4,5‐b′]‐dithiophene)‐co‐(1,3‐di(5‐thiophen‐2‐yl)‐5,7‐bis(2‐ethylhexyl)benzo[1′,2′‐c:4,5‐c′]dithiophene‐4,8‐dione))] (PBDB‐T): 3,9‐bis(2‐methylene‐(3‐(1,1‐dicyanomethylene)‐indanone))‐5,5,11,11‐tetrakis(4‐hexylphenyl)‐dithieno[2,3‐d:2′,3′‐d′]‐s‐indaceno[1,2‐b:5,6‐b′]dithiophene) (ITIC) solar cells doped with a third small molecule are systematically investigated, namely, (5Z,5′Z)‐5,5′‐((7,7′‐(9,9‐dioctyl‐9H‐fluorene‐2,7‐diyl)bis(benzo[c]1,2,5]thiadiazole‐7,4‐diyl))‐bis(methanylyl‐idene))bis(3‐ethyl‐2‐thioxothiazolidin‐4‐one) (FBR). Owing to the wide optical bandgap of FBR, blending PBDB‐T:ITIC with FBR increases the device's light‐harvesting capability in the short wavelength range (400–550 nm), which improves the short circuit current. Differential scanning calorimetry and grazing incidence wide angle X‐ray scattering analyses reveal that the FBR exhibits impressive miscibility with ITIC, leading to the formation of ITIC:FBR alloys. Optimum performance is achieved with a PBDB‐T:ITIC:FBR (1:0.8:0.2) cell, which yields a PCE of 11.17%, demonstrating a 10% improvement relative to the PBDB‐T:ITIC binary cell. Crucially, the ternary solar cells also show improved device stability, which is attributed to the formation of ITIC:FBR alloys suppressing the crystallization of ITIC. This study provides deep insights into the performance‐ and stability‐related improvements available to PSCs devices that incorporate a third conjugated small molecule.

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Alloy-like ternary polymer solar cells with over 17.2% efficiency

Cited by 266 publications

References 70 publications

Over 15.7% Efficiency of Ternary Organic Solar Cells by Employing Two Compatible Acceptors with Similar LUMO Levels

Over 15.7% Efficiency of Ternary Organic Solar Cells by Employing Two Compatible Acceptors with Similar LUMO Levels

Enhanced and Balanced Charge Transport Boosting Ternary Solar Cells Over 17% Efficiency

Simultaneous Performance and Stability Improvement of Ternary Polymer Solar Cells Enabled by Modulating the Molecular Packing of Acceptors

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