Improving the Fill Factor of Perovskite Solar Cells by Employing an Amine-tethered Diketopyrrolopyrrole-Based Polymer as the Dopant-free Hole Transport Layer

Liu, Wenbo; Ma, Yiming; Wang, Zongrui; Zhu, Mengya; Wang, Jiandong; Khalil, Maria; Wang, Hongyu; Gao, Weibo; Fan, Wenhui; Li, Weishi; Zhang, Qichun

doi:10.1021/acsaem.0c01085

Cited by 30 publications

(20 citation statements)

References 69 publications

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“…The P25NH exhibited high mobility, better aggregation than P3HT and stability at low concentrations, and a perovskite surface passivation effect. All of these benefits resulted in devices with a dopant-free low concentration of the P25NH with a comparatively high PCE (17.3%) [ 170 ]. Furthermore, Liu et al synthesized a new P5NH compound analogous to the previous polymer P25NH.…”

Section: Polymers In Perovskite Solar Cells (Pscs)mentioning

confidence: 99%

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Polymers in High-Efficiency Solar Cells: The Latest Reports

et al. 2022

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Third-generation solar cells, including dye-sensitized solar cells, bulk-heterojunction solar cells, and perovskite solar cells, are being intensively researched to obtain high efficiencies in converting solar energy into electricity. However, it is also important to note their stability over time and the devices’ thermal or operating temperature range. Today’s widely used polymeric materials are also used at various stages of the preparation of the complete device—it is worth mentioning that in dye-sensitized solar cells, suitable polymers can be used as flexible substrates counter-electrodes, gel electrolytes, and even dyes. In the case of bulk-heterojunction solar cells, they are used primarily as donor materials; however, there are reports in the literature of their use as acceptors. In perovskite devices, they are used as additives to improve the morphology of the perovskite, mainly as hole transport materials and also as additives to electron transport layers. Polymers, thanks to their numerous advantages, such as the possibility of practically any modification of their chemical structure and thus their physical and chemical properties, are increasingly used in devices that convert solar radiation into electrical energy, which is presented in this paper.

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Section: Polymers In Perovskite Solar Cells (Pscs)mentioning

confidence: 99%

“…The polymer P5NH was demonstrated to have higher mobility (5.13 × 10 −2 cm −2 V −1 s −1 ) than the reported P25NH (2.10 × 10 −2 cm −2 V −1 s −1 ). The fabricated PSC with the P5NH was achieved at an efficiency of 18.1% [ 170 , 171 ].…”

Section: Polymers In Perovskite Solar Cells (Pscs)mentioning

confidence: 99%

Polymers in High-Efficiency Solar Cells: The Latest Reports

et al. 2022

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“…Conjugated polymers, with their excellent intrinsic stability and easily tunable photoelectric properties, have been used as efficient and stable HTMs for pero-SCs [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]. In the conjugated polymers, planar structured D-A copolymers composed of an electron-donating (D) unit and an electronaccepting (A) unit possess the advantages of high hole mobility and tunable electronic energy levels by selecting different D-unit and different A-unit with different side chains.…”

Section: Introductionmentioning

confidence: 99%

Stable perovskite solar cells with efficiency of 22.6% via quinoxaline-based polymeric hole transport material

Zhu

Meng

et al. 2021

Sci. China Chem.

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Poor stability of spiro-OMeTAD hole transport materials (HTMs) with dopant is a major obstacle for the commercialization of perovskite solar cells (pero-SCs). Herein, we demonstrate a series of quinoxaline-based D-A copolymers PBQ5, PBQ6 and PBQ10 as the dopant-free polymer HTMs for high performance pero-SCs. The D-A copolymers are composed of fluorothienyl benzodithiophene (BDTT) as D-unit, difluoroquinoxaline (DFQ) with different side chains as A-unit, and thiophene as π-bridge, where the side chains on the DFQ unit are bi-alkyl for PBQ5, bi-alkyl-fluorothienyl for PBQ6, and alkoxyl for PBQ10. All the three copolymers are adopted as the dopant-free HTM in the pero-SCs. The planar n-i-p structured pero-SCs based on (FAPbI 3 ) 0.98 (MAPbBr 3 ) 0.02 with PBQ6 HTM demonstrated the high power conversion efficiency (PCE) of 22.6% with V oc of 1.13 V and FF of 80.8%, which is benefitted from the suitable energy level and high hole mobility of PBQ6. The PCE of 22.6% is the highest efficiency reported in the n-i-p structured pero-SCs based on dopant-free D-A copolymer HTM. In addition, the pero-SCs show significantly enhanced ambient, thermal and light-soaking stability compared with the devices with traditional spiro-OMeTAD HTM.

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“… 6 − 8 However, this promising technology still has drawbacks partly relating to organic hole-transporting materials (HTMs) which are important components of PSCs. 9 A conventional HTM, 2,2′,7,7′-tetrakis( N , N -di- p -methoxy-phenylamine)-9,9′-spirobifluorene (spiro-OMeTAD), is utilized in most of the high-efficiency PSCs. 10 − 12 However, this HTM suffers from two main disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Interfacial versus Bulk Properties of Hole-Transporting Materials for Perovskite Solar Cells: Isomeric Triphenylamine-Based Enamines versus Spiro-OMeTAD

Simokaitienė

Cekaviciute

Baucyte

et al. 2021

ACS Appl. Mater. Interfaces

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Here, we report on three new triphenylamine-based enamines synthesized by condensation of an appropriate primary amine with 2,2-diphenylacetaldehyde and characterized by experimental techniques and density functional theory (DFT) computations. Experimental results allow highlighting attractive properties including solid-state ionization potential in the range of 5.33–5.69 eV in solid-state and hole mobilities exceeding 10 –3 cm 2 /V·s, which are higher than those in spiro-OMeTAD at the same electric fields. DFT-based analysis points to the presence of several conformers close in energy at room temperature. The newly synthesized hole-transporting materials (HTMs) were used in perovskite solar cells and exhibited performances comparable to that of spiro-OMeTAD. The device containing one newly synthesized hole-transporting enamine was characterized by a power conversion efficiency of 18.4%. Our analysis indicates that the perovskite–HTM interface dominates the properties of perovskite solar cells. PL measurements indicate smaller efficiency for perovskite-to-new HTM hole transfer as compared to spiro-OMeTAD. Nevertheless, the comparable power conversion efficiencies and simple synthesis of the new compounds make them attractive candidates for utilization in perovskite solar cells.

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Improving the Fill Factor of Perovskite Solar Cells by Employing an Amine-tethered Diketopyrrolopyrrole-Based Polymer as the Dopant-free Hole Transport Layer

Cited by 30 publications

References 69 publications

Polymers in High-Efficiency Solar Cells: The Latest Reports

Polymers in High-Efficiency Solar Cells: The Latest Reports

Stable perovskite solar cells with efficiency of 22.6% via quinoxaline-based polymeric hole transport material

Interfacial versus Bulk Properties of Hole-Transporting Materials for Perovskite Solar Cells: Isomeric Triphenylamine-Based Enamines versus Spiro-OMeTAD

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