Morphological Control of Donor/Acceptor Interfaces in All-Polymer Solar Cells Using a Pentafluorobenzene-Based Additive

Kim, Hong Il; Kim, Minjun; Park, Cheolwoong; Kim, Hae Un; Lee, Han-Koo; Park, Jin Young

doi:10.1021/acs.chemmater.7b01718

Cited by 47 publications

(39 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, the RMS value for the reference binary layer was 1.4 nm, whereas the ternary layer demonstrated an RMS value of approximately 1.28 nm. This is proof that the addition of compound T enhances the interface quality between the active layer and hole transport layer, thereby indicating an improvement in FF and other PV parameters [77].…”

Section: Morphologysupporting

confidence: 59%

Benzothiadiazole Based Cascade Material to Boost the Performance of Inverted Ternary Organic Solar Cells

et al. 2020

View full text Add to dashboard Cite

A conjugated, ladder-type multi-fused ring 4,7-dithienbenzothiadiazole:thiophene derivative, named as compound ‘T’, was for the first time incorporated, within the PTB7:PC71BM photoactive layer for inverted ternary organic solar cells (TOSCs) realization. The effective energy level offset caused by compound T between the polymeric donor and fullerene acceptor materials, as well as its resulting potential as electron cascade material contribute to an enhanced exciton dissociation, electron transfer facilitator and thus improved overall photovoltaic performance. The engineering optimization of the inverted TOSC, ITO/PFN/PTB7:Compound T(5% v/v):PC71BM/MoO3/Al, resulted in an overall power conversion efficiency (PCE) of 8.34%, with a short-circuit current density (Jsc) of 16.75 mA cm−2, open-circuit voltage (Voc) of 0.74 V and a fill factor (FF) of 68.1%, under AM1.5G illumination. This photovoltaic performance was improved by approximately 12% with respect to the control binary device.

show abstract

Section: Morphologysupporting

confidence: 59%

Benzothiadiazole Based Cascade Material to Boost the Performance of Inverted Ternary Organic Solar Cells

et al. 2020

View full text Add to dashboard Cite

show abstract

“…[39] Recently,Park and co-workers reported the use of apentafluorobenzene-based additive (FPE) to control the donor/acceptor interfacial morphology via quadrupolar electrostatic interactions between the donor polymer (PBDTT-FTTE)a nd P(NDI2OD-T2).A ss hown in Figure 7b,t he CB + FPE (3 vol %) processed blend film exhibits as tronger (010) peak intensity for p-p stacking compared to the CB + DIO and CB processed blend films,which indicate that FPE is effective in promoting an ordered p-p stacking with p-face-on orientation among the polymer chains. [40] APSC devices that employ FPE as ap rocessing additive exhibit an enhanced J SC and FF metrics yielding aP CE of 4.5 % (entry 13 in Table 1), which is 55.2 %g reater than the CB + DIO and CB processed films. Thermal annealing can lead to the significantly enhanced crystallinity of both donor and acceptor for the APSCs.F or the PTzBI-Si:P(NDI2OD-T2) blends discussed above,t he annealed blend films exhibit stronger GIWAXS reflections with much higher pface-on intermolecular p-p stacking peaks than the as-cast films, leading to improved J SC (15.57 vs. 13.70 mA cm À2 ), which results in ah igher PCE (10.1 %v s. 8.3 %).…”

Section: Engineering Active Layer Processingmentioning

confidence: 99%

All‐Polymer Solar Cells: Recent Progress, Challenges, and Prospects

et al. 2019

View full text Add to dashboard Cite

For over two decades bulk‐heterojunction polymer solar cell (BHJ‐PSC) research was dominated by donor:acceptor BHJ blends based on polymer donors and fullerene molecular acceptors. This situation has changed recently, with non‐fullerene PSCs developing very rapidly. The power conversion efficiencies of non‐fullerene PSCs have now reached over 15 %, which is far above the most efficient fullerene‐based PSCs. Among the various non‐fullerene PSCs, all‐polymer solar cells (APSCs) based on polymer donor‐polymer acceptor BHJs have attracted growing attention, due to the following attractions: 1) large and tunable light absorption of the polymer donor/polymer acceptor pair; 2) robustness of the BHJ film morphology; 3) compatibility with large scale/large area manufacturing; 4) long‐term stability of the cell to external environmental and mechanical stresses. This Minireview highlights the opportunities offered by APSCs, selected polymer families suitable for these devices with optimization to enhance the performance further, and discusses the challenges facing APSC development for commercial applications.

show abstract

“…2‐Bromonaphthalene and 1‐methylnaphthalene increase miscibility of the BHJ components in a similar manner to 1CN. A pentafluorobenzene derivative of DPE and perfluorinated DIO show greater affinity for fluorinated polymers, increasing their surfactant characteristics and thus morphological impact. Though these examples are far from exhaustive, additives with similar chemical structures can clearly access the same enhancement mechanisms but due to their size or the nature of their electron‐rich subunit, some solvent additives are better suited for particular BHJ blends.…”

Section: A Brief History Of Solvent Additives In Organic Photovoltaicsmentioning

confidence: 99%

Solvent Additives: Key Morphology‐Directing Agents for Solution‐Processed Organic Solar Cells

et al. 2018

View full text Add to dashboard Cite

Organic photovoltaics (OPV) have the advantage of possible fabrication by energy-efficient and cost-effective deposition methods, such as solution processing. Solvent additives can provide fine control of the active layer morphology of OPVs by influencing film formation during solution processing. As such, solvent additives form a versatile method of experimental control for improving organic solar cell device performance. This review provides a brief history of solution-processed bulk heterojunction OPVs and the advent of solvent additives, putting them into context with other methods available for morphology control. It presents the current understanding of how solvent additives impact various mechanisms of phase separation, enabled by recent advances in in situ morphology characterization. Indeed, understanding solvent additives' effects on film formation has allowed them to be applied and combined effectively and synergistically to boost OPV performance. Their success as a morphology control strategy has also prompted the use of solvent additives in related organic semiconductor technologies. Finally, the role of solvent additives in the development of next-generation OPV active layers is discussed. Despite concerns over their environmental toxicity and role in device instability, solvent additives remain relevant morphological directing agents as research interests evolve toward nonfullerene acceptors, ternary blends, and environmentally sustainable solvents.

show abstract

Morphological Control of Donor/Acceptor Interfaces in All-Polymer Solar Cells Using a Pentafluorobenzene-Based Additive

Cited by 47 publications

References 49 publications

Benzothiadiazole Based Cascade Material to Boost the Performance of Inverted Ternary Organic Solar Cells

Benzothiadiazole Based Cascade Material to Boost the Performance of Inverted Ternary Organic Solar Cells

All‐Polymer Solar Cells: Recent Progress, Challenges, and Prospects

Solvent Additives: Key Morphology‐Directing Agents for Solution‐Processed Organic Solar Cells

Contact Info

Product

Resources

About