Low-temperature preparation achieving 10.95%-efficiency of hole-free and carbon-based all-inorganic CsPbI3 perovskite solar cells

Study on the Ion Substitution Mechanism of CsPbIBr2 Films Prepared by a Drop-Coating Method

“…where the n, K B , T, e, and I are the ideality factor, Boltzmann constant, elementary charge, absolute temperature, and light intensity, respectively. 11 It was found that the device fabricated with 90 μL of CsI methanol solution showed a smaller slope of 1.50 K B T/e, compared with the devices fabricated with 30 μL of CsBr methanol solution (2.54 K B T/e) and without methanol solution (2.10 K B T/e). It is well known that the charge recombination of the devices is less with a smaller slope value.…”

“…According to previous works, there is almost no charge recombination if the α value is close to 1. 11,36 From Figure 7b, it is found that the α value of the CsPbIBr 2 devices fabricated with 90 μL of CsI methanol solution was 0.991, which was the highest compared with the devices fabricated with 30 μL of CsBr methanol solution (0.958) and without methanol solution (0.978). The results indicated that the charge recombination of the CsPbIBr 2 device fabricated with 30 μL of CsBr methanol solution increased, while the device fabricated with 90 μL of CsI methanol solution decreased.…”

“…3−7 Among the group of CsPbX 3 , CsPbBr 3 is the most stable without encapsulation, but the utilization rate of sunlight is not well due to a band gap of 2.30 eV. 8−10 CsPbI 3 , despite having the lowest band gap, 11 rapidly changes to the yellow phase in an outdoor environment with over 30% humidity, leading to its performance's deterioration. 12−14 Therefore, to balance the stability and efficiency of the CsPbX 3 perovskite solar cells, CsPbIBr 2 is a good candidate owing to its band gap (2.05 eV) and good environmental tolerance.…”

Strategies for highly efficient and stable cesium lead iodide perovskite photovoltaics: mechanisms and processes

“…With the continuous development of research, [74][75][76][77][78][79][80][81][82][83][84] the voice of ''The true face of HPbI 3 is DMAI 3 '' is getting louder and the evidence is getting more and more abundant. Although DMA + plays an important role in the preparation of efficient and stable CsPbI 3 PSCs, there is still a long way to go to truly understand its optimization mechanism.…”

Biomass-derived carbon electrodes for supercapacitors and hybrid solar cells: towards sustainable photo-supercapacitors

“…116 A variety of carbon materials has been adopted to replace noble metals and many kinds of perovskite solar cell structures were proposed. [117][118][119][120][121][122][123][124][125][126][127][128][129][130][131][132][133][134][135][136] Carbon can indeed play double function, i.e., HTM and backcontact electrode.…”