Benzophenone: A Small Molecule Additive for Enhanced Performance and Stability of Inverted Perovskite Solar Cells

Elbohy, Hytham1,4; Suzuki, Hiroo1; Nishikawa, Takeshi1; Htun, Thiri1; Tsutsumi, Kosei1; Nakano, Chiyu1; Kyaw, Aung Ko Ko2,3; Hayashi, Yasuhiko1

2023-09-12

10.1021/acsami.3c09835

ACS APPLIED MATERIALS & INTERFACES   Impact Factor & Quartile

1944-8244

1944-8252

In this study, we investigated the impact of benzophenone (BP), a small molecule additive, on the performance and stability of inverted perovskite solar cells (PSCs). Specifically, we introduced BP into the perovskite precursor solution of FAPbI(3) to fabricate PSCs with an ITO/PEDOT:PSS/BP:FAPbI(3)/PCBM/C-60/PCB/Ag architecture. The incorporation of BP with an optimum concentration of 2 mg mL(-1) significantly enhanced the power conversion efficiency (PCE) of the inverted PSC from 13.12 to 18.84% with negligible hysteresis. Notably, the BP-based PSCs retained similar to 90% of their initial PCE after being stored in ambient air with 30% relative humidity at 25 degrees C for 700 h. In contrast, control devices showed rapid degradation, retaining only 30% of their initial value within 300 h under the same conditions. We attributed the superior performance and stability of the BP-based PSCs to the grain boundary passivation of the perovskite film. The improvement was mainly attributed to the intermolecular interaction between the O-donor Lewis base BP material and both Pb2+ and FA(+) in FAPbI(3). This effectively suppresses trap-assisted recombination and promotes the conversion of the delta-phase to photoactive and stable alpha-phase FAPbI(3). Overall, our findings suggest that BP is a promising additive for improving the performance and stability of inverted PSCs.

defects passivation perovskite solar cell air stability benzophenone additive

SCI

English

Others

National Natural Science Foundation of China[62150610496] ; Shenzhen Science and Technology Innovation Commission[JCYJ20220530113014033]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001075114600001

AMER CHEMICAL SOC

Web of Science

1.Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008530, Japan
2.Southern Univ Sci & Technol, Guangdong Univ, Key Lab Adv Quantum Dot Displays & Lighting, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Damietta Univ, Fac Sci, Phys Dept, New Damietta 34517, Egypt

Elbohy, Hytham,Suzuki, Hiroo,Nishikawa, Takeshi,et al. Benzophenone: A Small Molecule Additive for Enhanced Performance and Stability of Inverted Perovskite Solar Cells[J]. ACS APPLIED MATERIALS & INTERFACES,2023,15(38).

Elbohy, Hytham.,Suzuki, Hiroo.,Nishikawa, Takeshi.,Htun, Thiri.,Tsutsumi, Kosei.,...&Hayashi, Yasuhiko.(2023).Benzophenone: A Small Molecule Additive for Enhanced Performance and Stability of Inverted Perovskite Solar Cells.ACS APPLIED MATERIALS & INTERFACES,15(38).

Elbohy, Hytham,et al."Benzophenone: A Small Molecule Additive for Enhanced Performance and Stability of Inverted Perovskite Solar Cells".ACS APPLIED MATERIALS & INTERFACES 15.38(2023).