Eco–Friendly Solvent Engineered CsPbI_2.77Br_0.23 Ink for Large–Area and Scalable High Performance Perovskite Solar Cells

Journal Article · Wed Dec 13 00:00:00 EST 2023 · Advanced Materials

DOI:https://doi.org/10.1002/adma.202310279· OSTI ID:2283136

Abate, Seid Yimer ^[1]; Qi, Yifang ^[1]; Zhang, Qiqi ^[1]; Jha, Surabhi ^[2]; Zhang, Haixin ^[3]; Ma, Guorong ^[2]; Gu, Xiaodan ^[2]; Wang, Kun ^[3]; Patton, Derek ^[2]; Dai, Qilin  ^[1]

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1. Jackson State University, MS (United States)
2. University of Southern Mississippi, Hattiesburg, MS (United States)
3. University of Miami, Coral Gables, FL (United States); Mississippi State University, MS (United States)

Abstract The performance of large‐area perovskite solar cells (PSCs) has been assessed for typical compositions, such as methylammonium lead iodide (MAPbI ₃ ), using a blade coater, slot‐die coater, solution shearing, ink‐jet printing, and thermal evaporation. However, the fabrication of large‐area all‐inorganic perovskite films is not well developed. This study develops, for the first time, an eco‐friendly solvent engineered all‐inorganic perovskite ink of dimethyl sulfoxide (DMSO) as a main solvent with the addition of acetonitrile (ACN), 2‐methoxyethanol (2‐ME), or a mixture of ACN and 2‐ME to fabricate large‐area CsPbI _2.77 Br _0.23 films with slot‐die coater at low temperatures (40–50 °C). The perovskite phase, morphology, defect density, and optoelectrical properties of prepared with different solvent ratios are thoroughly examined and they are correlated with their respective colloidal size distribution and solar cell performance. The optimized slot‐die‐coated CsPbI _2.77 Br _0.23 perovskite film, which is prepared from the eco‐friendly binary solvents dimethyl sulfoxide:acetonitrile (0.8:0.2 v/v), demonstrates an impressive power conversion efficiency (PCE) of 19.05%. Moreover, the device maintains ≈91% of its original PCE after 1 month at 20% relative humidity in the dark. It is believed that this study will accelerate the reliable manufacturing of perovskite devices.

• Research Organization: Univ. of Alabama, Tuscaloosa, AL (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: EE0010242
• OSTI ID: 2283136
• Alternate ID(s): OSTI ID: 2246686
• Journal Information: Advanced Materials, Vol. 36, Issue 11; ISSN 0935-9648
• Publisher: Wiley
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
solvent engineering
slot-die coating
all-inorganic perovskite
eco-friendly solvent
binary and ternary solvent