All‐inorganic Perovskite Solar Cells

Electronic and Optical Properties of CsGeX3 (X= Cl, Br, and I) Compounds

“… 19 , 20 In fact, such compounds cover many interesting properties/novel features and have been investigated by both previous theoretical 21 − 28 and experimental methods. 29 − 32 …”

“…However, there are still many disadvantages, for example, the limit of large-scale applications owing to the toxicity of the lead element . Currently, the lead-free CsGeX 3 (X = Cl, Br, and I) compounds are other candidates to replace CsPbX 3 perovskites for solar cell and other applications. , In fact, such compounds cover many interesting properties/novel features and have been investigated by both previous theoretical − and experimental methods. − …”

“…29−32 On the experimental side, Li et al have successfully synthesized the CsGeI 3 compound and demonstrated that this material processes a high photocurrent (6 mA cm 2 ), which means that it is suitable for photovoltaic applications. 29 To enhance the photocurrent generation of WS 2 nanoflakes, WS 2 / CsGeBr 3 has been fabricated, with an external quantum yield and a responsivity of about ∼151% and 6.4 (A/W), respectively. 30 The absorption edges of CsGeCl 3 and CsGeBr 3 are very sensitive and significantly red-shift under applied external hydrostatic pressure.…”

Emerging Trends in Electron Transport Layer Development for Stable and Efficient Perovskite Solar Cells

“…This method yielded inorganic PSCs with a PCE reaching 14.45%. Wang et al [108] advanced the field by developing all-inorganic CsPbBr 3 devices with a hole-free mesoscopic structure, composed of m-TiO 2 /c-TiO 2 . By fine-tuning the fabrication process, they obtained CsPbBr 3 films with enlarged grain sizes and proceeded to construct carbon electrodes through a printing technique.…”

“…Impressively, these unencapsulated all-inorganic PSCs maintained stable performance in humid conditions at room temperature for three months and withstood extreme temperatures ranging from 100 to −22 °C, culminating in a PCE of 6.7%. [108] Furthering the advancements, Cui et al [109] contributed to this line of research by chemically modifying ETM TiO 2 with inorganic ammonium silicate fluoride. The fluorosilicate anions in this compound bonded with TiO 2 to passivate its surface defects and create dipole moments, enhancing energy level alignment.…”