Enhanced perovskite solar cell performance via defect passivation with ethylamine alcohol chlorides additive

Zhu, Kaiping; Cong, Shan; Lu, Zheng; Lou, Yanhui; He, Liang; Li, Jianmin; Ding, Jianning; Yuang, Ningyi; Rümmeli, Mark H.; Zou, Guifu

doi:10.1016/j.jpowsour.2019.04.056

Cited by 73 publications

(48 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The grain‐growth interface has profound influences on the perovskite crystallization and interfacial carrier transfer process. Inspired by previous reports that hydroxyl (—OH) and amine (—NH 2 ) groups can effectively interact with perovskites and passivate defects, [ 25 , 26 , 27 , 28 , 29 ] we anticipate that proper additives with such organic groups may induce exciting manipulation in perovskite film formation and hence influencing its photophysical properties. Herein, a small and water‐soluble organic molecule of APDO with both —OH and —NH 2 groups was employed to modify the HTL of poly(3,4‐ethylene dioxythiophene):polystyrene sulfonic acid (PEDOT:PSS) (see the details in the Experimental Section).…”

Section: Resultsmentioning

confidence: 99%

“…During the continuous crystallization process of CsPb(Br/Cl) 3 perovskite from the precursor solution on the APDO‐modified PEDOT:PSS HTL, the ‐OH group in APDO tends to form the hydrogen bonding with the halide anions (Br − /Cl − ) at the perovskite grain‐growth interface, which has been verified by the measurements of 1 H nuclear magnetic resonance and Fourier transform infrared spectroscopy (Figure S12 and S13 , Supporting Information). [ 25 , 29 , 39 , 40 ] As depicted in Figure 4a , such an interaction between the modified PEDOT:PSS and perovskite holds great potential in providing masses of nucleation seeds tightly linked onto the grain‐growth substrate for preferential crystallization of PbX 2 octahedrons (X = Br/Cl). The resulting perovskite film exhibits much more uniform and pinhole‐free morphology with smaller grain sizes (see in Figure 1d ).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Interfacial “Anchoring Effect” Enables Efficient Large‐Area Sky‐Blue Perovskite Light‐Emitting Diodes

Shen

Wang

et al. 2021

Advanced Science

View full text Add to dashboard Cite

While tremendous progress has recently been made in perovskite light-emitting diodes (PeLEDs), large-area blue devices feature inferior performance due to uneven morphologies and vast defects in the solution-processed perovskite films. To alleviate these issues, a facile and reliable interface engineering scheme is reported for manipulating the crystallization of perovskite films enabled by a multifunctional molecule 2-amino-1,3-propanediol (APDO)-triggered "anchoring effect" at the grain-growth interface. Sky-blue perovskite films with large-area uniformity and low trap states are obtained, showing the distinctly improved radiative recombination and hole-transport capability. Based on the APDO-induced interface engineering, synergistical boost in device performance is achieved for large-area sky-blue PeLED (measuring at 100 mm 2 ) with a peak external quantum efficiency (EQE) of 9.2% and a highly prolonged operational lifetime. A decent EQE up to 6.1% is demonstrated for the largest sky-blue device emitting at 400 mm 2 .

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Interfacial “Anchoring Effect” Enables Efficient Large‐Area Sky‐Blue Perovskite Light‐Emitting Diodes

Shen

Wang

et al. 2021

Advanced Science

View full text Add to dashboard Cite

show abstract

“…For perovskite films containing 3% PbAc2, the N-H bond was red shifted to 1571 cm −1 , demonstrating that hydrogen bonding affects adjacent N-H bonds by reducing its vibration frequency. Recently, Zhu et al [35] found that ethylamine alcohol chloride (EA•HCl) was introduced into the perovskite film to effectively passivate the defect state. As shown in Figure 7a, EA•HCl has two groups: a hydroxyl group (-OH) and an ammonium group (-NH3), which interact with the halogen in MAPbIxCl3-x to form a hydrogen bond that inhibits ion migration.…”

Section: Hydrogen Bondsmentioning

confidence: 99%

“…Bifunctional groups can passivate defects by generating hydrogen bonding interactions or by coordinating with undercoordinated iodide ions to immobilize the halide anions of the perovskite. The perovskite grain size Recently, Zhu et al [35] found that ethylamine alcohol chloride (EA•HCl) was introduced into the perovskite film to effectively passivate the defect state. As shown in Figure 7a, EA•HCl has two groups: a hydroxyl group (-OH) and an ammonium group (-NH 3 ), which interact with the halogen in MAPbI x Cl 3-x to form a hydrogen bond that inhibits ion migration.…”

Section: Hydrogen Bondsmentioning

confidence: 99%

A Review on Improving the Quality of Perovskite Films in Perovskite Solar Cells via the Weak Forces Induced by Additives

Yang

Chen

et al. 2019

Applied Sciences

View full text Add to dashboard Cite

Perovskite solar cells (PSCs) employing organic-inorganic halide perovskite as active layers have attracted the interesting of many scientists since 2009. The power conversion efficiency (PCE) have pushed certified 25.2% in 2019 from initial 3.81% in 2009, which is much faster than that of any type of solar cell. In the process of optimization, many innovative approaches to improve the morphology of perovskite films were developed, aiming at elevate the power conversion efficiency of perovskite solar cells (PSCs) as well as long-term stability. In the context of PSCs research, the perovskite precursor solutions modified with different additives have been extensively studied, with remarkable progress in improving the whole performance. In this comprehensive review, we focus on the forces induced by additives between the cations and anions of perovskite precursor, such as hydrogen bonds, coordination or some by-product (e.g., mesophase), which will lead to form intermediate adduct phases and then can be converted into high quality films. A compact uniform perovskite films can not only upgrade the power conversion efficiency (PCE) of devices but also improve the stability of PSCs under ambient conditions. Therefore, strategies for the implementation of additives engineering in perovskites precursor solution will be critical for the future development of PSCs. How to manipulate the weak forces in the fabrication of perovskite film could help to further develop high-efficiency solar cells with long-term stability and enable the potential of future practical applications.

show abstract

“…Those defects may create shallow and deep levels in the bulk bandgap. In some recent years, several reports are showing the improvement in the PSC stability and performance by the addition of additive or passivation molecules with the purpose to reduce or passivate the defects [3][4][5][13][14][15][16][17] . However, it is still necessary to gain more understanding in the detailed mechanism and extent of these defects affecting the PSC performance.…”

mentioning

confidence: 99%

Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements

Hidayat

Nurunnizar

Fariz

et al. 2020

Sci Rep

View full text Add to dashboard Cite

This report shows that, by using simple transient photovoltage (TPV) measurements, we can reveal a significant correlation between the TPV decay characteristics and the performance of these perovskite solar cells. TPV decay seems to be composed of a rising part in a short interval after photoexcitation and a long decaying part that extends up to tens of milliseconds. These decay behaviors look different depending on the mesoscopic structures and the perovskite morphology formed therein, as seen from their Scanning Electron Microcopy images and X-ray diffraction patterns. The decay part can be fitted with a three-exponential decay, which reflects different kinetics of electrons in the perovskite/TiO2 layer. On the other hand, the rising part must be fit by a decay equation derived by employing the convolution theorem, where the rising part can be assigned to the electron transport process inside the perovskite layer and the decaying part can be assigned to electron back-transfer. The characteristics can be then understood by considering the effect of crystal defects and trap states in the perovskite grains and perovskite interface with its transport layer, which is TiO2 in this study. Although the TPV decay occurs in a time range much longer than the primary process of photoexcitation as commonly observed in transient photoluminescence spectroscopy, the processes involved in this TPV strongly correlates with the performance of these perovskite solar cells.

show abstract

Enhanced perovskite solar cell performance via defect passivation with ethylamine alcohol chlorides additive

Cited by 73 publications

References 29 publications

Interfacial “Anchoring Effect” Enables Efficient Large‐Area Sky‐Blue Perovskite Light‐Emitting Diodes

Interfacial “Anchoring Effect” Enables Efficient Large‐Area Sky‐Blue Perovskite Light‐Emitting Diodes

A Review on Improving the Quality of Perovskite Films in Perovskite Solar Cells via the Weak Forces Induced by Additives

Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements

Contact Info

Product

Resources

About