Highly efficient and low hysteresis methylammonium-free perovskite solar cells based on multifunctional oteracil potassium interface modification

Bi, Huan; Guo, Yao; Guo, Mengna; Ding, Chao; Hayase, Shuzi; Mou, Tong; Shen, Qing; Han, Gaoyi; Hou, Wenjing

doi:10.1016/j.cej.2022.135671

Cited by 32 publications

(37 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Perovskite solar cells (PSCs) have made great achievement since it was first reported due to their significantly lengthy photoinduced charge carrier diffusion lengths, − longer carrier lifetime, − high optical absorption coefficients, and other factors. , PSCs’ power conversion efficiency (PCE) has risen from 3.8% to a certified 25.7% . However, there are still amount of problems that need to be solved such as (1) how to further enhance the PCE of PSCs; (2) how to improve the operational and environmental stability of the PSCs, especially for organic–inorganic PSCs; and (3) how to prevent lead leakage and recover the leaked lead.…”

Section: Introductionmentioning

confidence: 99%

Multistrategy Preparation of Efficient and Stable Environment-Friendly Lead-Based Perovskite Solar Cells

Han

Guo

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Perovskite solar cells (PSCs) have achieved huge success in power conversion efficiency (PCE) and stability. However, further improving the PCE of PSCs and stability is still a big challenge. Here, we attempt to improve the PCE and stability of PSCs using a functional additive named 3-mercaptopropyltriethoxysilane (SiSH) in the perovskite antisolvent. It is revealed that SiSH can release the stress in the film, reduce the defects, and inhibit lithium-ion migration and lead leakage. As a result, the target device achieves an efficiency enhancement from 20.80 to 22.42% as compared to the control device. Meanwhile, device stability is ameliorated after SiSH modification. Furthermore, new adsorbents are used to treat the leaked lead to make it comply with safe drinking water standards. This work provides an idea for developing multifunctional antisolvent additives and adsorbents for high PCE, long stability, and environment-friendly Pb-based PSCs.

show abstract

Section: Introductionmentioning

confidence: 99%

Multistrategy Preparation of Efficient and Stable Environment-Friendly Lead-Based Perovskite Solar Cells

Han

Guo

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

“…In which, the τ 1 /τ 2 represent the fast/slow decay component, and A 1 /A 2 refer to the corresponding amplitude. [ 36 ] Upon coating the Spiro and IL/Spiro, the average lifetime (τ ave ) drop from 57.45 to 36.46 and 23.44 ns, respectively. The shorter τ ave implies that the IL can accelerate the hole transfer process further.…”

Section: Resultsmentioning

confidence: 99%

Phosphate Functionalized Ionic Liquid: An Efficient Li⁺ Migration Inhibitor and Hole Extraction Accelerator for Perovskite Solar Cells

Hou

Kang

et al. 2022

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

There is no doubt that the hole transporting layer (HTL) plays an indispensable role in highly efficient devices. [5] The materials used for HTL include: (1) organic polymer molecules, [6,7] such as poly(3,4ethylenedioxy thiophene):poly(styrene sulfonate) (PEDOT:PSS), poly[bis(4-phenyl) (2,4,6-trimethylphenyl)amine] (PTAA) and poly(3-hexylthiophen-2,5-diyl) (P3HT); (2) inorganic compound, [8] for instance, CuSCN and NiO X . Besides, small molecule HTL materials have been widely studied due to their designability in molecular structure. [9] The organic 2,2′,7,7′-tetrakis (N,N-dip-methoxyphenylamine)-9,9′spirobifluorene (Spiro-OMeTAD) has been extensively employed as hole transport layer for high-performance devices due to its suitable energy level alignment and great solubility. [10] However, the amorphous characteristic of Spiro-OMeTAD depends its low hole mobility (∼4 × 10 −5 cm 2 V −1 s −1 ). [10,11] The bis(trifluoromethane)sulfonimide lithium salt (Li-TFSI) and 4-tert-Butylpyridine (TBP) are always used as the dopant of Spiro-OMeTAD. [10,11] TBP was used to reduce phase separation of Spiro-OMeTAD and Li-TFSI. [10,11] Li-TFSI can enhance the hole mobility of Spiro-OMeTAD by promoting the oxidation process of Spiro-OMeTAD in an ambient atmosphere. [12] However, this oxidation process is always uncontrollable owing to the oxidized Spiro-OMeTAD can be reduced to its initial state during the device operation process, [13] which leads to the instable device. Besides, the hygroscopic properties Lithium bis(trifluoromethanesulfonyl)imide (Li-TFSI) doped 2,2′,7,7′ -tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD) is employed as one of the most common hole transport layer. However, the Li + in Li-TFSI is easy to migrate from Spiro-OMeTAD to perovskite and SnO 2 , left the voids/pinholes in perovskite film to accelerate the invasion of oxygen and moisture, and lead to the device degradation. Here, the 1-butyl-3-methyl imidazolium phosphate dibutyl ester ([Bmim] + [DBP] − ) ionic liquid (IL) is prepared and used to modify the perovskite/Spiro-OMeTAD interface in the perovskite solar cells. The coordination interaction between P  O in [Bmim] + [DBP] − IL and Pb 2+ can improve the morphology of perovskite film by passivating the uncoordinated Pb 2+ defects. The interaction between P  O and Li + can suppress the undesired Li + migration. The regulated energy level assignment and ion nature of [Bmim] + [DBP] − IL can accelerate the carrier extraction at perovskite/Spiro-OMeTAD interface. The device based on the [Bmim] + [DBP] − IL interface modification yields a highly efficient photoelectric conversion efficiency of 21.16% and improved stability, outperforming that of control (19.31%) devices under the illumination of 100 mW cm −2 (AM 1.5 G).

show abstract

“…Among the various candidate electron transport materials, SnO 2 deposited at low temperature has the advantages of high optical transmittance, resistance to UV light and excellent electron mobility, providing a good electronic transfer material for PSCs. [20][21][22][23] Recently, champion PCEs of 25.7% and 25.3% were obtained with the SnO 2 ETL substrate, highlighting the potential deployment of SnO 2 nanoparticles in perovskite solar devices.…”

Section: Introductionmentioning

confidence: 99%

Polymer-complexed SnO₂ electron transport layer for high-efficiency n-i-p perovskite solar cells

Zhou

et al. 2022

Nanoscale

View full text Add to dashboard Cite

show abstract

Highly efficient and low hysteresis methylammonium-free perovskite solar cells based on multifunctional oteracil potassium interface modification

Cited by 32 publications

References 62 publications

Multistrategy Preparation of Efficient and Stable Environment-Friendly Lead-Based Perovskite Solar Cells

Multistrategy Preparation of Efficient and Stable Environment-Friendly Lead-Based Perovskite Solar Cells

Phosphate Functionalized Ionic Liquid: An Efficient Li⁺ Migration Inhibitor and Hole Extraction Accelerator for Perovskite Solar Cells

Polymer-complexed SnO₂ electron transport layer for high-efficiency n-i-p perovskite solar cells

Contact Info

Product

Resources

About

Highly efficient and low hysteresis methylammonium-free perovskite solar cells based on multifunctional oteracil potassium interface modification

Cited by 32 publications

References 62 publications

Multistrategy Preparation of Efficient and Stable Environment-Friendly Lead-Based Perovskite Solar Cells

Multistrategy Preparation of Efficient and Stable Environment-Friendly Lead-Based Perovskite Solar Cells

Phosphate Functionalized Ionic Liquid: An Efficient Li+ Migration Inhibitor and Hole Extraction Accelerator for Perovskite Solar Cells

Polymer-complexed SnO2 electron transport layer for high-efficiency n-i-p perovskite solar cells

Contact Info

Product

Resources

About

Phosphate Functionalized Ionic Liquid: An Efficient Li⁺ Migration Inhibitor and Hole Extraction Accelerator for Perovskite Solar Cells

Polymer-complexed SnO₂ electron transport layer for high-efficiency n-i-p perovskite solar cells