A facile strategy for enhanced performance of inverted organic solar cells based on low-temperature solution-processed SnO2 electron transport layer

Coordination‐Induced Defects Elimination of SnO2 Nanoparticles via a Small Electrolyte Molecule for High‐Performance Inverted Organic Solar Cells

“…To verify the coordination effect formed PAS and SnO 2 during the doped process, the X-ray photoelectron spectroscopy (XPS) was studied (Figure 2a). [22,43] It can be seen that after PAS was used to dope SnO 2 , the characteristic peaks of Sn 3d 5/2 and Sn 3d 3/2 both shift to the direction of low binding energy with 0.24 eV offset, which indicates the atom of Sn can be coordinated with O on the sulfonate of PAS (Figure 2b). The electrons contribute to the 3d empty orbitals of Sn 4+ , thereby cutting the defects of oxygen vacancy in SnO 2 and improving the charge extraction and collection capabilities.…”

“…[18] ZnO, TiO x , and SnO 2 are typical and widely used metal oxides in photovoltaic devices. [19][20][21][22] Compared with TiO 2 , ZnO, and other metal oxides, SnO 2 has a bandgap of up to 3.7 eV, with a WF of 4.1 eV and higher electron mobility. Furthermore, the photovoltaic devices with SnO 2 ETL can even exist stably in the air without encapsulation and even can withstand the corrosion of high-temperature heating treatment and humid air, which has better stability than TiO 2 and ZnO.…”

A facile strategy to adjust SnO2/perovskite interfacial properties for high-efficiency perovskite solar cells

“…The non-radiative recombination centers at the interface include halide vacancies, cation vacancies of the perovskite, oxygen vacancies and traps induced by hydroxyl groups (-OH) of SnO 2 , etc. [8][9][10][11] In order to solve the above problems, some techniques have been applied. As an effective interface engineering technology, self-assembled monolayers (SAMs) have been widely used in organic solar cells (OSCs) and light-emitting diodes (LEDs), and based PSCs yielded a significant increase in PCE from 20.25% to 22.61%.…”

“…At the same time, the 1.68 eV wide-band gap perovskite solar cell achieved a PCE close to 20% and the semitransparent device also achieved an efficiency of over 17%.become the core technology in the field of PSCs in recent years. 8,[12][13][14] Yang et al obtained high performance SnO 2 -based PSCs through fine control of the interface interaction between the SAM and perovskite, with an efficiency of 18.8%. 10 Huang and coworkers adopted a dopamine (DA) SAM as an interlayer at the ETL/perovskite interface.…”

Effective Double Electron Transport Layer Inducing Crystallization of Active Layer for Improving the Performance of Organic Solar Cells

“…An appropriate interface modification material is extremely important for the preparation of efficient and stable OSCs. Currently, metal oxides, such as titanium oxide (TiO X ), zinc oxide (ZnO), and stannic oxide (SnO 2 ), are commonly used as charge transport materials [ 9 , 10 , 11 , 12 , 13 ]. However, these materials can cause some defects during the preparation of interface layer due to their inherent properties.…”