Electrochemical synthesis of annealing-free and highly stable black-phase CsPbI₃ perovskite

Abstract

All-inorganic CsPbI3 halide perovskite has become a hot research topic for applications in next-generation optoelectronic devices. However, the main limitations are the high-temperature synthesis and poor phase stability. In this...

Intermediate-Phase-Modified Crystallization for Stable and Efficient CsPbI3 Perovskite Solar Cells

“…Compared with organic–inorganic halide perovskite materials, all-inorganic CsPbI 3 perovskite is free from the troubles caused by the degradation of formamidinium (FA + ) or methylammonium (MA + ), even though the power conversion efficiency (PCE) of the former already exceeded 25%. , Nowadays, relying on the superior thermal stability and suitable bandgap ( E g = 1.7 eV), all-inorganic perovskite is on the list of alternative materials for tandem solar cells with silicon. − Theoretically, there are three black perovskite phases (α-CsPbI 3 , β-CsPbI 3 , and γ-CsPbI 3 ) and one yellowish nonperovskite phase (δ-CsPbI 3 ), , and it is worth noticing that the spontaneous phase conversion from perovskite to nonperovskite always happens when the black phases are selected as the light absorber layer materials in PSCs …”

“…3−5 Theoretically, there are three black perovskite phases (α-CsPbI 3 , β-CsPbI 3 , and γ-CsPbI 3 ) and one yellowish nonperovskite phase (δ-CsPbI 3 ), 6,7 and it is worth noticing that the spontaneous phase conversion from perovskite to nonperovskite always happens when the black phases are selected as the light absorber layer materials in PSCs. 8 To remove those obstacles to improving the performance of PSCs, researchers have carried out versatile solutions, including but not limited to facilitating electron transportation, 9,10 composing mixed-dimensional perovskite phases, 11−13 engineering the components, 14−16 and adopting surface passivation. 17 For instance, the application of tetrabutylammonium iodide (TBAI) to mend the defects and boost PCE was realized by forming a two-dimensional (2D) phase with the perovskite structure upon the surface.…”

20.67%‐Efficiency Inorganic CsPbI3 Solar Cells Enabled by Zwitterion Ion Interface Treatment

“…[ 4 ] As an alternative choice, all‐inorganic CsPbI 3 PSCs composed of only Cs, Pb, and I in light absorption layer have attracted much attentions. [ 5–18 ]…”

“…[4] As an alternative choice, all-inorganic CsPbI 3 PSCs composed of only Cs, Pb, and I in light absorption layer have attracted much attentions. [5][6][7][8][9][10][11][12][13][14][15][16][17][18] However, the PCE of all-inorganic CsPbI 3 PSCs is still much lower than that of organic-inorganic hybrid PSCs. [3] Defect passivation strategy is an effective way to enhance the performance of all-inorganic PSCs.…”

Optoelectronic simulation of a four-terminal all-inorganic CsPbI3/CZTSSe tandem solar cell with high power conversion efficiency

“…Studies indicate that the stability of PSCs can be enhanced by replacing the hybrid organic–inorganic absorber layer with an inorganic halide perovskite layer, without compromising the photovoltaic performance of the device. 4 Researchers have synthesized highly stable black phase CsPbI 3 at room temperature under ambient conditions, 5 which improves the power conversion efficiency (PCE) of all-inorganic perovskite solar cells (PSCs). Over the past decade, the PCE of PSCs has reached record levels, rapidly increasing from 3.13% 4 to 25.8%.…”