A Universal Strategy to Utilize Polymeric Semiconductors for Perovskite Solar Cells with Enhanced Efficiency and Longevity

Abstract

In this contribution, a facile and universal method is successfully reported to fabricate perovskite solar cells (PSCs) with enhanced efficiency and stability. Through dissolving functional conjugated polymers in antisolvent chlorobenzene to treat the spinning CH 3 NH 3 PbI 3 perovskite film, the resultant devices exhibit significantly enhanced efficiency and longevity simultaneously. In-depth characterizations demonstrate that thin polymer layer well covers the top surface of perovskite film, resulting in certain surface passivation and morphology modification. More importantly, it is shown that through rational chemical modification, namely molecular fluorination, the air stability and photostability of the perovskite solar cells are remarkably enhanced. Considering the vast selection of conjugated polymer materials and easy functional design, promising new results are expected in further enhancement of device performance. It is believed that the findings provide exciting insights into the role of conjugated polymer in improving the current perovskite-based solar cells.

Conjugated Molecules “Bridge”: Functional Ligand toward Highly Efficient and Long‐Term Stable Perovskite Solar Cell

“…As just other evidence of the structure orientation variation effected by aniline passivation, grazing‐incidence wide‐angle X‐ray scattering (GIWAXS) was utilized to investigate the crystal features in the pristine and aniline‐treated perovskite films . Figure S10a–c in the Supporting Information shows the 2D GIWAXS patterns of pristine and aniline‐modified perovskite films (control, M‐PPA, and M‐PPEA).…”

Band-Aligned Polymeric Hole Transport Materials for Extremely Low Energy Loss α-CsPbI3 Perovskite Nanocrystal Solar Cells

“…[1][2][3][4][5] Starting from the innovative work by Miyasaka et al, in 2009, 6 organic-inorganic ABX 3 (A is an organic cation, B is commonly Pb, and X is a halide) halide perovskites have opened avenues for next-generation photovoltaic (PV) applications with exploration of entire families of perovskite materials. [7][8][9][10][11] Benefiting from their high light absorption coefficient, low exciton binding energy, and long charge carrier diffusion length, [12][13][14] perovskite solar cells (PSCs) have progressed at an unprecedented rate over the past 8 years, with power conversion efficiencies (PCEs) now approaching 23%, 15 situating them at the forefront of solution-processed PV devices.…”

14.1% CsPbI3 Perovskite Quantum Dot Solar Cells via Cesium Cation Passivation

“…Due to the great efforts on CQDs synthesis modification, [7][8][9] surface passivation, [10][11][12] and device fabrication optimization, [13][14][15][16] PbS QD solar cells continue to progress at an extraordinary rate, improving overall efficiencies by ≈1% per year and currently have a certified power conversion efficiency (PCE) exceeding 12%. [18][19][20][21][22][23][24][25][26][27][28] However, the challenging stability issues of these hybrid perovskites further motivate the research of all-inorganic perovskites (CsPbX 3 , X = Cl − , Br − , I − or mixed halides) without any volatile organic components. [18][19][20][21][22][23][24][25][26][27][28] However, the challenging stability issues of these hybrid perovskites further motivate the research of all-inorganic perovskites (CsPbX 3 , X = Cl − , Br − , I − or mixed halides) without any volatile organic components.…”