Efficient and Versatile Interconnection Layer by Solvent Treatment of PEDOT:PSS Interlayer for Air‐Processed Organic Tandem Solar Cells

Prosa, Mario; Tessarolo, Marta; Bolognesi, Margherita; Cramer, Tobias; Chen, Zhihua; Facchetti, Antonio; Seri, Mirko; Ruani, G.; Muccini, Michele

doi:10.1002/admi.201600770

Cited by 27 publications

(15 citation statements)

References 44 publications

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“…Moreover, modifying PEDOT:PSS might affect unfavorably the distribution of the insulating PSS part, creating an energy barrier. Prosa et al proposed a simple approach to recover the good functioning of a PEDOT:PSS film deposited from a suspension including a surfactant (Zonyl FS‐300) . By simply rinsing the film with isopropanol, part of the surfactant and the excess of PSS at the surface of the layer could be removed.…”

Section: Tandem Solar Cellsmentioning

confidence: 99%

Advances in Solution‐Processed Multijunction Organic Solar Cells

2018

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Single-junction solar cells are principally limited in performance by two factors (Figure 1a). Electrons excited by photons with energy higher than the bandgap relax to the band edges, releasing surplus energy as heat (thermalization loss). Photons with energy lower than the bandgap are not absorbed (transmission loss). These losses can be alleviated with two or more absorber layers. The first layer should feature a wide bandgap material to reduce the thermalization loss for high-energy photons. The second layer should have a lower bandgap to absorb the low-energy photons that pass the first layer. In such configuration a tandem cell provides less thermalization and less transmission losses than each of the corresponding single-junction cells. In the detailed-balance limit, a double-junction (tandem) cell can reach an efficiency of 42% and a triple-junction cell 49%. [6] To construct a tandem cell, the two complementary absorber layers must be stacked optically and electrically ( Figure 1b). The interconnecting layer (ICL) between the two subcells must pass light and sustain the photocurrent by providing an optically transparent electrical contact for recombination of electrons and holes from the adjacent photoactive layers. The Fermi level of the hole-transporting layer (HTL) and the electron-transporting layer (ETL) that jointly form the ICL must match the relevant highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels in the adjacent photoactive layers (Figure 1b). The ICL should not cause voltage losses and have low resistance. The open-circuit voltage (V OC ) of the tandem solar cell is ideally the sum of the V OC s of the subcells and the photocurrent is limited by the subcell generating less current. To overcome the intrinsic performance limits of single-junction cells, the subcells should absorb complementary regions of the solar spectrum and generate equal photocurrent.In the first organic tandem solar cells, materials were thermally evaporated. Initially only metal clusters were used to interconnect the subcells, [7][8][9] later complemented by p-and n-doped organic transport layers. [10,11] In 2007, the first fully solution-processed tandem polymer solar cells were reported by Gilot et al. [12] and Kim et al. [13] In both examples the ICL featured a layer of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) as HTL, stacked on top of either a zinc oxide or a titanium oxide layer as ETL. Kim et al. achieved a PCE of 6.5%. Since then PCEs have steadily increased. Major improvements involved the use of more efficient photoactive blends that afford a high V OC relative to their optical bandgap The efficiency of organic solar cells can benefit from multijunction device architectures, in which energy losses are substantially reduced. Herein, recent developments in the field of solution-processed multijunction organic solar cells are described. Recently, various strategies have been investigated and implemented to improve the performance of these device...

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Section: Tandem Solar Cellsmentioning

confidence: 99%

Advances in Solution‐Processed Multijunction Organic Solar Cells

2018

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“…In tandem OSCs, DPP-based polymers were always used in the top subcells to harvest low-energy photons. Quite a few research work was based on multithiophene and DPP blocks, such as poly[ (2,5- [73,74] [75][76][77][78] poly [3,6- [79] [80]…”

Section: Polymer Donorsmentioning

confidence: 99%

“…[33] To circumvent that, the pH neutral PEDOT:PSS analogues of m-PEDOT:PSS and highly conductive poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PH100) with high viscosity were used. [21,33,[38][39][40]58,70,[75][76][77]85,97,99,102,122,[127][128][129]132,138,144,164,208] Zhou and coworkers found that PEDOT:PSS with surfactant deposited on top of nonfullerene-based tandem OSCs might lead to chemical reaction between PEDOT:PSS and the NFA (IT-4F), which would be detrimental to the device performance. [100] To avoid the direct deposition of PEDOT:PSS on top of the active layer, they introduced a hydrogen molybdenum bronze (H x MoO 3 ) layer between the bottom active layer and PEDOT: PSS.…”

Section: The Icls For Tandem Oscsmentioning

confidence: 99%

Recent Advances Toward Highly Efficient Tandem Organic Solar Cells

Peng

2020

Small Structures

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Organic solar cells (OSCs) have attracted considerable attentions and have witnessed rapid progress from the aspects of material design, device engineering, and device physics. Tandem OSCs stacking more than one single-junction device in series or parallel connection are developed to diminish the thermalization and/ or transmission losses for improving the device performances. The optical managements by developing new photoactive materials, using high-conductive semitransparent interconnecting layers and smart device architectures are the key factors toward high-performance tandem OSCs. Herein, the recent advances in tandem OSCs are summarized from the aspects of photosensitive materials, interconnecting layers, and specific device structures. Finally, challenges and perspectives in the future development of tandem OSCs are also presented.

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“…Previously, in organic solar cells and perovskite solar cells, some polar solvents including ethylene glycol (EG), dimethyl sulfoxide (DMSO), dopamine, F4-TCNQ, dimethyl formamide (DMF), imidazole, etc. have been used as additives to enhance the PEDOT:PSS conductivity and tune the work-function [35][36][37][38]. Among them, DMSO exhibits superior advantages due to its good dielectric constant, dipolar moment, and relatively higher boiling point.…”

Section: Introductionmentioning

confidence: 99%

High Performance Planar Structure Perovskite Solar Cells Using a Solvent Dripping Treatment on Hole Transporting Layer

Wang¹,

Lü

Zhang³

et al. 2020

Coatings

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Perovskite solar cell efficiency is not only related with material properties, but also affected by the interface engineering that used in perovskite solar cells. The perovskite film/electrode interface properties play important roles in charge carrier extraction, transport, and recombination. To achieve better interface contact for the device operation, proper interlayers or surface treatment should be applied. In this study, we applied a poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) interlayer with a solvent/solution washing treatment as the hole transport layer. It showed that by the solvent/solution treatment, the PEDOT:PSS film conductivity was significantly enhanced, and hence, the charge carrier transfer efficiency was efficiently improved, and the device short-circuit current density was enlarged. Finally, the device efficiency significantly increased from 14.8% to 16.2%.

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Efficient and Versatile Interconnection Layer by Solvent Treatment of PEDOT:PSS Interlayer for Air‐Processed Organic Tandem Solar Cells

Cited by 27 publications

References 44 publications

Advances in Solution‐Processed Multijunction Organic Solar Cells

Advances in Solution‐Processed Multijunction Organic Solar Cells

Recent Advances Toward Highly Efficient Tandem Organic Solar Cells

High Performance Planar Structure Perovskite Solar Cells Using a Solvent Dripping Treatment on Hole Transporting Layer

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