Solution processable D–A small molecules for bulk-heterojunction solar cells

Li, Yaowen; Guo, Qing; Li, Zaifang; Pei, Jinjin; Tian, Wenjing

doi:10.1039/c003946b

Cited by 233 publications

(181 citation statements)

References 72 publications

Supporting

Mentioning

176

Contrasting

Unclassified

Order By: Relevance

“…Since the porphyrin core is weak donor and 3-ethylrhodanine is strong acceptor form a weak donor -strong acceptor configuration can provide a favourable HOMO and LUMO energy levels, as well as suitable energy bandgap, which is beneficial for the efficient photovoltaic performance of BHJ OSCs. 23 …”

Section: Optical and Electrochemical Propertiesmentioning

confidence: 99%

CuSCN as selective contact in solution-processed small-molecule organic solar cells leads to over 7% efficient porphyrin-based device

et al. 2016

View full text Add to dashboard Cite

show abstract

Section: Optical and Electrochemical Propertiesmentioning

confidence: 99%

CuSCN as selective contact in solution-processed small-molecule organic solar cells leads to over 7% efficient porphyrin-based device

et al. 2016

View full text Add to dashboard Cite

show abstract

“…This combination allows the molecular orbitals to be tuned so as to enable intramolecular charge transfer (ICT). 11 The open circuit voltage (V oc ) of OPVs is directly related to the gap between the highest occupied molecular orbital (HOMO) of the polymer and lowest unoccupied molecular orbital (LUMO) of the fullerene. Tuning of the polymer molecular orbitals therefore enables the V oc to be maximized.…”

Section: ■ Introductionmentioning

confidence: 99%

Tailored Donor–Acceptor Polymers with an A–D1–A–D2 Structure: Controlling Intermolecular Interactions to Enable Enhanced Polymer Photovoltaic Devices

et al. 2014

View full text Add to dashboard Cite

Extensive efforts have been made to develop novel conjugated polymers that give improved performance in organic photovoltaic devices. The use of polymers based on alternating electron-donating and electron-accepting units not only allows the frontier molecular orbitals to be tuned to maximize the open-circuit voltage of the devices but also controls the optical band gap to increase the number of photons absorbed and thus modifies the other critical device parameterthe short circuit current. In fact, varying the nonchromophoric components of a polymer is often secondary to the efforts to adjust the intermolecular aggregates and improve the charge-carrier mobility. Here, we introduce an approach to polymer synthesis that facilitates simultaneous control over both the structural and electronic properties of the polymers. Through the use of a tailored multicomponent acceptor−donor−acceptor (A−D−A) intermediate, polymers with the unique structure A−D1−A−D2 can be prepared. This approach enables variations in the donor fragment substituents such that control over both the polymer regiochemistry and solubility is possible. This control results in improved intermolecular π-stacking interactions and therefore enhanced charge-carrier mobility. Solar cells using the A−D1−A−D2 structural polymer show shortcircuit current densities that are twice that of the simple, random analogue while still maintaining an identical open-circuit voltage. The key finding of this work is that polymers with an A−D1−A−D2 structure offer significant performance benefits over both regioregular and random A−D polymers. The chemical synthesis approach that enables the preparation of A−D1−A−D2 polymers therefore represents a promising new route to materials for high-efficiency organic photovoltaic devices.

show abstract

“…This is the basis of the BHJ concept (Figure 1), where the active layer consists of an interpenetrating network of donor and acceptor materials so that all the excitons are produced close to a heterojunction and thus generating polaron pairs anywhere in the film [31]. As a result, low-cost and efficient devices can be fabricated because of the bicontinuous morphology of the BHJ [32][33][34]. The intermixing distance of the two materials (donor and acceptor) should be less than the exciton-diffusion length.…”

Section: Bhj Solar Cellsmentioning

confidence: 99%

Recent Approaches to Controlling the Nanoscale Morphology of Polymer-Based Bulk-Heterojunction Solar Cells

et al. 2013

View full text Add to dashboard Cite

Abstract:The need for clean, inexpensive and renewable energy has increasingly turned research attention towards polymer photovoltaic cells. However, the performance efficiency of these devices is still low in comparison with silicon-based devices. The recent introduction of new materials and processing techniques has resulted in a remarkable increase in power-conversion efficiency, with a value above 10%. Controlling the interpenetrating network morphology is a key factor in obtaining devices with improved performance. This review focuses on the influence of controlled nanoscale morphology on the overall performance of bulk-heterojunction (BHJ) photovoltaic cells. Strategies such as the use of solvents, solvent annealing, polymer nanowires (NWs), and donor-acceptor (D-A) blend ratios employed to control the active-layer morphologies are all discussed.

show abstract

Solution processable D–A small molecules for bulk-heterojunction solar cells

Cited by 233 publications

References 72 publications

CuSCN as selective contact in solution-processed small-molecule organic solar cells leads to over 7% efficient porphyrin-based device

CuSCN as selective contact in solution-processed small-molecule organic solar cells leads to over 7% efficient porphyrin-based device

Tailored Donor–Acceptor Polymers with an A–D1–A–D2 Structure: Controlling Intermolecular Interactions to Enable Enhanced Polymer Photovoltaic Devices

Recent Approaches to Controlling the Nanoscale Morphology of Polymer-Based Bulk-Heterojunction Solar Cells

Contact Info

Product

Resources

About