Improving the Optoelectronic Properties of Mesoporous TiO<sub>2</sub> by Cobalt Doping for High-Performance Hysteresis-free Perovskite Solar Cells

Sidhik, Siraj; Cerdán‐Pasarán, Andrea; Esparza, Diego; Luke, Tzarara López; Carriles, Ramón

doi:10.1021/acsami.7b16312

Cited by 81 publications

(79 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the realization of metal doped TiO 2 with upward shift of CBM is still needed to simultaneously improve the PSC performance and resolve the J–V hysteresis. Most recently, Sidhik et al reported a cobalt doping of mesoporous TiO 2 by using a conventional thermal diffusion and fabricated PSCs . However, their device performance (18.16% of PCE and 1.2% of hysteresis) leave room for improvement when comparing to other transition metal doping.…”

Section: Summary Of the Device Performance For The Mesoscopic Pscsmentioning

confidence: 98%

Resolving Hysteresis in Perovskite Solar Cells with Rapid Flame‐Processed Cobalt‐Doped TiO₂

Kim

Chai

et al. 2018

Advanced Energy Materials

View full text Add to dashboard Cite

To further increase the open‐circuit voltage (V oc) of perovskite solar cells (PSCs), many efforts have been devoted to doping the TiO2 electron transport/selective layers by using metal dopants with higher electronegativity than Ti. However, those dopants can introduce undesired charge traps that hinder charge transport through TiO2, so the improvement in the V oc is often accompanied by an undesired photocurrent density–voltage (J–V) hysteresis problem. Herein, it is demonstrated that the use of a rapid flame doping process (40 s) to introduce cobalt dopant into TiO2 not only solves the J–V hysteresis problem but also increases the V oc and power conversion efficiency of both mesoscopic and planar PSCs. The reasons for the simultaneous improvements are two fold. First, the flame‐doped Co‐TiO2 film forms Co‐Ov (cobalt dopant‐oxygen vacancy) pairs and hence reduces the number density of Ti3+ trap states. Second, Co doping upshifts the band structure of TiO2, facilitating efficient charge extraction. As a result, for planar PSCs, the flame doping of Co increases the efficiency from 17.1% to 18.0% while reducing the hysteresis from 16.0% to 1.7%. Similarly, for mesoscopic PSCs, the flame doping of Co increases the efficiency from 18.5% to 20.0% while reducing the hysteresis from 7.0% to 0.1%.

show abstract

Section: Summary Of the Device Performance For The Mesoscopic Pscsmentioning

confidence: 98%

Resolving Hysteresis in Perovskite Solar Cells with Rapid Flame‐Processed Cobalt‐Doped TiO₂

Kim

Chai

et al. 2018

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…In PSC devices, TiO 2 is the most widely used ETL material [26,[37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] . The proper band gap and high transmittance of TiO 2 guarantee the high performance of PSCs.…”

Section: Introductionmentioning

confidence: 99%

SnO2-based electron transporting layer materials for perovskite solar cells: A review of recent progress

Chen

Meng

Zhang

et al. 2019

Journal of Energy Chemistry

148

View full text Add to dashboard Cite

“…The Cl‐capped TiO 2 colloidal nanocrystal film working as planar ETL can significantly reduce the hysteresis, by approaching efficient surface passivation of the trap at perovskite/TiO 2 interface and then lowering surface recombination. The cobalt‐doped TiO 2 ETL is also reported to produce hysteresis‐free PVSCs, by passivating the surface trap or sub‐band‐gap states …”

Section: Mobile Ions In Pvscs and Influence From Ctlsmentioning

confidence: 99%

Device Physics of the Carrier Transporting Layer in Planar Perovskite Solar Cells

Ren

Wang

Choy

2019

Advanced Optical Materials

View full text Add to dashboard Cite

strategies for efficiency improvement. [3,4] Currently, it is found that the film quality of the perovskites synthesized by the newly developed approaches is capable of producing an absorption layer delivering the PCE of over 20%. The engineering of the interfacial properties has become a critical issue for the material scientists, engineers, and physicists. The further improvement of PCE requires multidisciplinary collaborative investigations. There are recent reports on the modifications of the commonly used carrier transport materials including the organic materials, inorganic materials, nanocomposites, etc. For the organic materials, 2,2′,7,7′-tetrakis(N,Nd i -p -m e t h o x y p h e n y l -a m i n e ) 9 , 9 ′spirobifluorene (Spiro-OMeTAD), poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), and poly (triarylamine) (PTAA) are typically used to transport holes. [5][6][7][8][9][10][11][12][13][14][15][16][17] The fullerene based materials and their derivatives are also intensively studied as electron transport materials, such as the phenyl-C 61 -butyric acid methyl ester (PCBM), C 60 bathocuprione (BCP), etc. Meanwhile, the relatively low-cost nonfullerenes, e.g., 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′] dithiophene) (ITIC) and their derivatives that possess excellent optical and electrical properties compared with their fullerene counterparts are also promising for highly efficient and stable PVSCs. [18][19][20][21][22][23][24][25][26][27][28][29] Regarding the inorganic semiconductor materials, metal oxides possess superior stability and tunable optical and electrical properties compared with the organic semiconductor materials. The various metal oxides such as titanium dioxide (TiO 2 ), [13,[30][31][32][33][34][35][36][37][38] zinc oxide (ZnO), [39,40,38,19,41] and tin oxide (SnO 2 ) [42][43][44][45][46][47][48][49] are commonly used as the electron transport layer (ETL), while nickel oxide (NiO x ), [50][51][52][53] copper oxide (Cu 2 O), [54,55] copper (I) thiocyanate (CuSCN), [16,56,57] copper gallium oxide (CuGaO 2 ), [58] and nickel cobalt oxide (NiCoO x ) [12,59] serve as the hole transport layer (HTL) in the PVSCs. [60,61] Meanwhile, several theoretical studies based on different approaches to the device models have also been reported, focusing on the underlying physics of the efficiency loss, [62] hysteresis phenomena, [63][64][65][66] etc., which are substantially affected by the carrier transport layer (CTL) properties. These models enable the analysis of the device performance from the macroscopic circuit aspect [67] to the microscopic carrier level, [65] which offer a comprehensive understanding of the device physics of CTLs in PVSCs.Perovskite solar cells (PVSCs) have emerged as a promising candidate for addressing the energy crisis due to their rapid efficiency improvement up to 24.2% within 10 years. The defects existing in perovskite film have been found to be as low as 10 15 cm ...

show abstract

Improving the Optoelectronic Properties of Mesoporous TiO₂ by Cobalt Doping for High-Performance Hysteresis-free Perovskite Solar Cells

Cited by 81 publications

References 63 publications

Resolving Hysteresis in Perovskite Solar Cells with Rapid Flame‐Processed Cobalt‐Doped TiO₂

Resolving Hysteresis in Perovskite Solar Cells with Rapid Flame‐Processed Cobalt‐Doped TiO₂

SnO2-based electron transporting layer materials for perovskite solar cells: A review of recent progress

Device Physics of the Carrier Transporting Layer in Planar Perovskite Solar Cells

Contact Info

Product

Resources

About

Improving the Optoelectronic Properties of Mesoporous TiO2 by Cobalt Doping for High-Performance Hysteresis-free Perovskite Solar Cells

Cited by 81 publications

References 63 publications

Resolving Hysteresis in Perovskite Solar Cells with Rapid Flame‐Processed Cobalt‐Doped TiO2

Resolving Hysteresis in Perovskite Solar Cells with Rapid Flame‐Processed Cobalt‐Doped TiO2

SnO2-based electron transporting layer materials for perovskite solar cells: A review of recent progress

Device Physics of the Carrier Transporting Layer in Planar Perovskite Solar Cells

Contact Info

Product

Resources

About

Improving the Optoelectronic Properties of Mesoporous TiO₂ by Cobalt Doping for High-Performance Hysteresis-free Perovskite Solar Cells

Resolving Hysteresis in Perovskite Solar Cells with Rapid Flame‐Processed Cobalt‐Doped TiO₂

Resolving Hysteresis in Perovskite Solar Cells with Rapid Flame‐Processed Cobalt‐Doped TiO₂