A comparative study on optical properties of BiOI, Bi7O9I3 and Bi5O7I materials

All-solution-processed environment-friendly solid-state BiOI photovoltaic cell with high-short-circuit current by successive ionic layer adsorption and reaction (SILAR)

“…Which is hinting that at 40 cycle's condition, the photovoltaic properties might be affected badly. All the previously reported also indicating that beyond 30 cycles, it is very much hard to get uniform morphology and surface, but in the case of photovoltaic cell absorber layer uniformity is very important [10,36]. Therefore, at 30 dip-SILAR cycle condition (thickness 410 nm), we can expect maximum solar cell performance.…”

“…Here, cation source: Bi(NO 3 ) 3 .5H 2 O and anion source: KI and deionized water were used for different SILAR cycle number and after completing the desire cycle number, all the samples have been annealed for 10 min at 100°C. The detailed SILAR procedure and the fundamental material properties of BiOI, such as band gap are reported in our previous papers [10,11,27,28,37]. Here, the investigation of absorber layer morphology has been conducted via a scanning electron microscopy (SEM, JSM-6510).…”

“…The research world has put the environment into the highest priority and every day trying to develop new, different, cost effective and environment-friendly photovoltaic cells. Concerning the time demand, the researcher is focusing on developing various materials and flexible substrate-based photovoltaic cell [1][2][3][4][5][6][7][8][9][10][11][12][13]. Once the structure of BiOX (Cl, Br, I) has been reported by Bannister et al invented in 1935 since then, BiOI has drawn the enormous attention among the researcher for energy materials [10,14,15].…”

“…pairs via sunlight utilization [16][17][18][19][20][21][22]. Recently, BiOI is being considered as an absorber material for photovoltaic application due to the wide range of visible light spectra [10,[23][24][25][26]. Another well-known fact about the nontoxic BiOI material is easy to synthesis.…”

“…As for the thin film deposition method, many research articles have reported various synthesis techniques such as CVD [13], chemical bath deposition (CBD) [30], sol-gel method [31], spin coating [27] and dual-port ultrasonic spray pyrolysis technique [32], successive ionic layer adsorption and reaction (SILAR) process [10,[32][33][34][35] to produce BiOI thin films. To fabricate the BiOI solar cell at low cost in the future, all-solution process without using vacuum at low temperature is preferable.…”