Defect Passivation through Cyclohexylethylamine Post-treatment for High-Performance and Stable Perovskite Solar Cells

Liao, Mingyue; Liu, Jia; Zuo, Tao; Meng, Lingyi; Yang, Yuqian; Wu, Jihuai; Lu, Can‐Zhong; Sun, Weihai; Xie, Yiming

doi:10.1021/acsaem.1c02536

Cited by 6 publications

(4 citation statements)

References 66 publications

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“…To probe into the surface chemical states of the perovskite films, XPS measurements were performed (Figure S6(a)). Figure (d) shows that the peak from adsorbed O decreased significantly in the modified perovskite film, manifesting that BOPP can protect the perovskite from oxygen in the environment . Comparing the high-resolution Pb 4f XPS of the pristine film, two peaks located at 138.59 and 143.45 eV are assigned to Pb 4f 7/2 and Pb 4f 5/2 , respectively, and both shift to the lower binding energy direction (138.30 and 143.16 eV) after BOPP modification (Figure (e)).…”

Section: Results and Disussionmentioning

confidence: 90%

“…Figure 1(d) shows that the peak from adsorbed O decreased significantly in the modified perovskite film, manifesting that BOPP can protect the perovskite from oxygen in the environment. 35 Comparing the high-resolution Pb 4f XPS of the pristine film, two peaks located at 138.59 and 143.45 eV are assigned to Pb 4f 7/2 and Pb 4f 5/2 , respectively, 10 and both shift to the lower binding energy direction (138.30 and 143.16 eV) after BOPP modification (Figure 1(e)). Such downshifts 23 To gain a deeper insight into the chemical interaction between BOPP and the perovskite component, Fourier-transform infrared (FTIR) spectra of the as-obtained sample were provided (Figure S7).…”

Section: ■ Results and Disussionmentioning

confidence: 99%

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Defect Passivation by Natural Piperine Molecule Enabling for Stable Perovskite Solar Cells with Efficiencies over 23%

Jia

Guo

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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Effective modulation of defects and carrier transport behaviors at the surfaces and grain boundaries of solution-processed perovskites has proven to be a vital strategy for suppressing charge recombination, allowing for efficient and stable perovskite solar cells (PSCs). Herein, a natural molecule (E,E)-1-[5-(1,3-benzodioxol-5-yl)-1-oxo-2,4-pentadienyl]-piperidine (BOPP) with a carbonyl group and π-conjugated structure is incorporated into perovskites using a one step antisolvent procedure. The as-prepared perovskites improved crystallization and decreased defect density, which is ascribed to the passivation effect of BOPP due to the carbonyl group forming coordination bonds with undercoordinated Pb 2+ ions via Lewis acid− base interactions. Incorporating BOPP into the perovskite layer results in a better arrangement of energy levels between the perovskite and Spiro-OMeTAD interface, contributing to more efficient carrier injection and transport. The results show that the BOPP-passivated device achieves a champion power conversion efficiency (PCE) of 23.37% with a steady-state power output of 22.95%, compared with a PCE of 21.49% for the pristine device. At the same time, the unencapsulated devices maintained around 95% of their original PCEs after aging under relative humidities of 15%−30% over 3000 h. Moreover, this work gives a viable avenue to fabricate highquality perovskite layers for optoelectronic applications using natural compound additives.

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Section: Results and Disussionmentioning

confidence: 90%

Section: ■ Results and Disussionmentioning

confidence: 99%

Defect Passivation by Natural Piperine Molecule Enabling for Stable Perovskite Solar Cells with Efficiencies over 23%

Jia

Guo

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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“…18,50 The dependency of V OC and J SC on the light intensity was investigated to gain deeper insight into the carrier recombination mechanisms of PSCs. 51 According to J SC = I a , the J SC alters as a function of the light intensity in Fig. 3f, and the a value is approximated to 1, reecting the smaller bimolecular recombination loss in PSCs.…”

Section: Resultsmentioning

confidence: 99%

Fine-tuning chemical passivation over photovoltaic perovskites by varying the symmetry of bidentate acceptor in D–A molecules

Guo

et al. 2023

J. Mater. Chem. A

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“…[87] The peak shift in the XPS (Pb and I) data are attributed to the coordination between the polymers and perovskite. [88,89] The lone pair of electrons from the polymers (due to N, O, and S) could interact with MAPbI 3 perovskite layer. [90,91] P2 has oxygen atoms and P3 has sulfur atoms in their structure compared to P1.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the Passivation Effects of PEDOT:PSS on Inverted Perovskite Solar Cells

Almtiri

Giri

et al. 2022

Advanced Energy Materials

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Poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a popular hole transport material in perovskite solar cells (PSCs). However, the devices with PEDOT:PSS exhibit large open‐circuit voltage (Voc) loss and low efficiency, which is attributed to mismatched energy level alignment and the poor interface of PEDOT:PSS and perovskite. Here, three polymer analogues to polyaniline (PANI), PANI–carbazole (P1), PANI–phenoxazine (P2), and PANI–phenothiazine (P3) are designed with different energy levels to modify the interface between PEDOT:PSS and the perovskite layer and improve the device performance. The effects of the polymers on the device performance are demonstrated by evaluating the work function adjustment, perovskite growth control, and interface modification in MAPbI3‐based PSCs. Low bandgap Sn–Pb‐based PSCs are also fabricated to confirm the effects of the polymers. Three effects are evaluated through the comparison study of PEDOT:PSS‐based organic solar cells and MAPbI3 PSCs based on the PEDOT:PSS modified by P1, P2, and P3. The order of contribution for the three effects is work function adjustment > surface modification > perovskite growth control. MAPbI3 PSCs modified with P2 exhibit a high Voc of 1.13 V and a high‐power conversion efficiency of 21.06%. This work provides the fundamental understanding of the interface passivation effects for PEDOT:PSS‐based optoelectronic devices.

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Defect Passivation through Cyclohexylethylamine Post-treatment for High-Performance and Stable Perovskite Solar Cells

Cited by 6 publications

References 66 publications

Defect Passivation by Natural Piperine Molecule Enabling for Stable Perovskite Solar Cells with Efficiencies over 23%

Defect Passivation by Natural Piperine Molecule Enabling for Stable Perovskite Solar Cells with Efficiencies over 23%

Fine-tuning chemical passivation over photovoltaic perovskites by varying the symmetry of bidentate acceptor in D–A molecules

Evaluation of the Passivation Effects of PEDOT:PSS on Inverted Perovskite Solar Cells

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