Multifunctional dopamine-assisted preparation of efficient and stable perovskite solar cells

Zhang, Jiankai; Yu, Huangzhong

doi:10.1016/j.jechem.2020.05.061

Cited by 47 publications

(31 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lower trap density of perovskite film is decisive in reducing E loss caused by trap states‐induced nonradiative recombination and improving the device performance. [ 43 ] The T‐Nb 2 CT x MXene nanosheets additive in the perovskite film may serve as recombination centers because they can easily capture electrons from the perovskite. The PL measurements for perovskite films doped with different amount of T‐Nb 2 CT x MXene nanosheets additive grown on the glass substrates were performed, as shown in Figure S11, Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

Amino‐Functionalized Niobium‐Carbide MXene Serving as Electron Transport Layer and Perovskite Additive for the Preparation of High‐Performance and Stable Methylammonium‐Free Perovskite Solar Cells

Zhang

Huang

Sun

et al. 2022

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

Perovskite solar cells have shown great potential in commercial applicationsdue to their high performance and easy fabrication. However, the electron transport layer (ETL) materials with good optoelectrical properties and energy levels matching that of the perovskite layer still need to be explored to meet the need of commercialization. In this work, 2D Nb 2 CT x MXene nanosheets are prepared and their work function (WF) is reduced from 4.65 to 4.32 eV to match the conduction band minimum of perovskite layer by replacing the surface -F groups with NH 2 groups through hydrazine (N 2 H 4 ) treatment. Besides, the N 2 H 4 treated (T-Nb 2 CT x ) MXene nanosheets with abundant NH 2 groups are incorporated into the perovskite precursor to retard the crystallization rate by forming hydrogen bond with iodine ions, which promotes the formation of high-quality and oriented growth perovskite films. Consequently, the PVSCs with T-Nb 2 CT x MXene ETLs and T-Nb 2 CT x MXene nanosheets additive exhibit the highest power conversion efficiency (PCE) of 21.79% and the corresponding flexible and large-area devices achieve the highest PCE of 19.15% and 18.31%. Meanwhile, the unencapsulated devices maintain 93% of the original PCEs after 1500 h of storage. This work demonstrates the considerable application prospects of 2D Nb 2 CT x MXene in photoelectric devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Amino‐Functionalized Niobium‐Carbide MXene Serving as Electron Transport Layer and Perovskite Additive for the Preparation of High‐Performance and Stable Methylammonium‐Free Perovskite Solar Cells

Zhang

Huang

Sun

et al. 2022

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Relevant studies reveal that uncoordinated ions, metallic Pb (Pb 0 ) and iodide (I 0 ), are the central deep-level trap states lying in perovskite films. , Also, the report exhibits that Pb 0 is the primary defect that deteriorates device performance and stability . Approaches, including composition engineering, film optimization engineering, additive engineering, ,,, and interfacial modification engineering, have been presented to reduce Pb 0 defects.…”

Section: Introductionmentioning

confidence: 99%

Postpassivation of Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.83Br_0.17)₃ Perovskite Films with Tris(pentafluorophenyl)borane

Jia

Dong

Shi

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Passivating defects to suppress recombination is a valid tactic to improve the performance of third-generation perovskite-based solar cells. Pb0 is the primary defect in Pb-based perovskites. Here, tris(pentafluorophenyl)borane is inserted between the perovskite and spiro-OMeTAD layer in SnO2-based planar perovskite solar cells. The incorporation of tris(pentafluorophenyl)borane can effectively passivate Pb0 defects, decreasing recombination at the surface of the perovskite film. Additionally, the modification with tris(pentafluorophenyl)borane decreases the grain boundaries quantity in the perovskite film, enhancing the transportation capability of carriers. The resulting perovskite solar cell gets a high efficiency of 21.42%. While the reference device without tris(pentafluorophenyl)borane treatment acquires an efficiency of 19.07%. More importantly, the stability tests manifest that incorporating tris(pentafluorophenyl)borane in perovskite solar cells is conducive to the stability of the device.

show abstract

“…When 0.1 wt % GHK-Cu was doped into PBDB-T:ITIC, both μ h,SCLC and μ e,SCLC were significantly enhanced to values of 7.39 × 10 –4 and 6.48 × 10 –4 cm 2 V –1 s –1 , respectively, accompanied by the most counterbalanced μ h,SCLC /μ e,SCLC value of 1.14. On the one hand, when moderate GHK-Cu was introduced into PSCs, a more counterbalanced μ h,SCLC /μ e,SCLC ratio indicated less charge accumulation and charge-carrier recombination in PSCs . On the other hand, higher carrier mobility improved the charge collection in the electrode and further improved the FF and J SC of the device, in which the enhancement of μ h,SCLC and μ e,SCLC was attributed to the wider, purer crystal domain and the improvement of ITIC crystallinity as shown by AFM and GIWAXS measurements, which benefitted the formation of the double-continuous interpenetrating conductive network .…”

Section: Resultsmentioning

confidence: 87%

“…On the one hand, when moderate GHK-Cu was introduced into PSCs, a more counterbalanced μ h,SCLC /μ e,SCLC ratio indicated less charge accumulation and charge-carrier recombination in PSCs. 39 On the other hand, higher carrier mobility improved the charge collection in the electrode and further improved the FF and J SC of the device, in which the enhancement of μ h,SCLC and μ e,SCLC was attributed to the wider, purer crystal domain and the improvement of ITIC crystallinity as shown by AFM and GIWAXS measurements, which benefitted the formation of the double-continuous interpenetrating conductive network. 40 However, when the GHK-Cu content increased to 0.2 wt %, the μ h,SCLC and μ e,SCLC , respectively, decreased to 7.05 × 10 −4 and 5.68 × 10 −4 cm 2 V −1 s −1 , accompanied by the unbalanced μ h,SCLC /μ e,SCLC value of 1.24, because excessive GHK-Cu (0.2 wt %) resulted in severe phase separation and excessive aggregation of PBDB-T, which reduced the area of the donor/acceptor contact interface and the charge-transport channel.…”

Section: Ternary-film Morphologymentioning

confidence: 94%

Efficient Ternary Polymer Solar Cells with Tunable Crystallinity and Phase Separation of Active Layers via Incorporating GHK-Cu

Huang

2021

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

The crystallinity of a nonfullerene small-molecule acceptor plays an important function in the bimolecular recombination and carrier transfer of polymer solar cells (PSCs). However, because of the competition between the donor (PBDB-T) and acceptor (ITIC) in processes of phase separation and crystallization, the PBDB-T preferentially forms a crystalline network, which limits the molecular diffusion of ITIC and leads to the weak crystallinity of ITIC, eventually restricting the photoelectric conversion efficiency (PCE) of PSCs. Therefore, in our work, a small-molecule biomaterial, Gly-His-Lys-Cu (SMBM GHK-Cu), is incorporated into binary PBDB-T:ITIC to construct a PBDB-T:ITIC:GHK-Cu ternary system. The addition of GHK-Cu increases ITIC crystallinity and promotes the formation in continuous single-phase domains of PBDB-T and ITIC, which creates an optimized bicontinuous network path to increase and balance charge transmission in PSCs. Meanwhile, GHK-Cu makes energy transfer from GHK-Cu to PBDB-T appreciably efficient, improving the photon capture and exciton-generation rate of PBDB-T. Moreover, it can form a complementary absorption spectrum with PBDB-T and ITIC, which enhances the PCE of ternary devices. Excitingly, the PCE of PSC-based PBDB-T:ITIC is enhanced from 10.28% to 12.07% via incorporating 0.1 wt % GHK-Cu into PBDB-T:ITIC, in which the enhanced open voltage (V OC) is 0.92 V, the short-circuit current (J SC) is 17.87 mA/cm2, and the fill factor (FF) is 73.4%. Meanwhile, the PCE of PSC-based PM6:Y6 is also enhanced from 15.21% for a binary PSC to 17.11% for ternary PSC-based PM6:Y6:0.1 wt % GHK-Cu. This work shows that the cheap and environmentally friendly GHK-Cu has great potential for application in tuning the crystallinity and phase separation of the active layer.

show abstract

Multifunctional dopamine-assisted preparation of efficient and stable perovskite solar cells

Cited by 47 publications

References 59 publications

Amino‐Functionalized Niobium‐Carbide MXene Serving as Electron Transport Layer and Perovskite Additive for the Preparation of High‐Performance and Stable Methylammonium‐Free Perovskite Solar Cells

Amino‐Functionalized Niobium‐Carbide MXene Serving as Electron Transport Layer and Perovskite Additive for the Preparation of High‐Performance and Stable Methylammonium‐Free Perovskite Solar Cells

Postpassivation of Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.83Br_0.17)₃ Perovskite Films with Tris(pentafluorophenyl)borane

Efficient Ternary Polymer Solar Cells with Tunable Crystallinity and Phase Separation of Active Layers via Incorporating GHK-Cu

Contact Info

Product

Resources

About

Multifunctional dopamine-assisted preparation of efficient and stable perovskite solar cells

Cited by 47 publications

References 59 publications

Amino‐Functionalized Niobium‐Carbide MXene Serving as Electron Transport Layer and Perovskite Additive for the Preparation of High‐Performance and Stable Methylammonium‐Free Perovskite Solar Cells

Amino‐Functionalized Niobium‐Carbide MXene Serving as Electron Transport Layer and Perovskite Additive for the Preparation of High‐Performance and Stable Methylammonium‐Free Perovskite Solar Cells

Postpassivation of Cs0.05(FA0.83MA0.17)0.95Pb(I0.83Br0.17)3 Perovskite Films with Tris(pentafluorophenyl)borane

Efficient Ternary Polymer Solar Cells with Tunable Crystallinity and Phase Separation of Active Layers via Incorporating GHK-Cu

Contact Info

Product

Resources

About

Postpassivation of Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.83Br_0.17)₃ Perovskite Films with Tris(pentafluorophenyl)borane