Perovskite Solar Cells: Donor–Acceptor Type Dopant‐Free, Polymeric Hole Transport Material for Planar Perovskite Solar Cells (19.8%) (Adv. Energy Mater. 4/2018)

Kim, Guan‐Woo; Lee, Junwoo; Kang, Gyeongho; Kim, Tae‐Wan; Park, Jin Young

doi:10.1002/aenm.201870018

Cited by 16 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This considerable improvement is illustrated with better interfacial contact associated with π–π stacking of PGE with PANi channel, consequently the diffusion length of hole is increased and also interface resistance is reduced . The surface energy of HTL is reduced giving rise to improved kinetics of charge carrier .…”

Section: Resultsmentioning

confidence: 99%

Functionalized Thermoplastic Polyurethane as Hole Conductor for Quantum Dot-Sensitized Solar Cell

Kumar

Maurya

Prakash

et al. 2018

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

A hole conducting layer for quantum dot sensitized solar cell (QDSS) as a function of redox behavior has been reported. Polyurethanes, comprising hard and soft segments, have been functionalized for its use in solar cell application. Functionalization has been confirmed through NMR and FTIR studies. The functionalization of hard segment results in incorporation of ionic moieties which enhances its electrical conductivity, electrochemical and optical properties and displays a crucial role as a hole transport materials for QDSS cells due to proper work function and reduces energy barrier at the interface of active layer and counter electrode leading to reversible charge transport without decomposition. Cadmium sulfide (CdS) quantum dot has been synthesized using capping agent and the size (4 nm) and shape (spherical) has been confirmed through various techniques, including TEM, AFM, SEM, and DLS. Energy diagram of whole system has been revealed by measuring HOMO–LUMO and VB–CB energy gap through cyclic voltammetry and UV–vis spectrophotometry. The proper energy level alignment with electron transport layer and electron collecting layer provides suitability to transport hole for continuous harvesting of light. Solar cell device has been fabricated using successful layered design of functionalized polyurethane. The incorporation of a thin polyaniline (PANi) layer helps reducing the electron transport toward reverse direction (cathode) by adjusting the LUMO energy gap of polymer gel electrolyte and confirms re-excitation of dropped electron toward quantum dots (photoanode) through quenching under continuous illumination. The device with structure FTO/TiO2/CdS/PANi/PGE/Pt exhibits a photocurrent density of (J sc ∼ 2.20 mA/cm2), open circuit voltage V oc of 0.60 V, fill factor of 0.78 and photovoltaic conversion efficiency (PCE) of 1.25% using functionalized polyurethane.

show abstract

Section: Resultsmentioning

confidence: 99%

Functionalized Thermoplastic Polyurethane as Hole Conductor for Quantum Dot-Sensitized Solar Cell

Kumar

Maurya

Prakash

et al. 2018

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…Conjugated polymers, with their excellent intrinsic stability and easily tunable photoelectric properties, have been used as efficient and stable HTMs for pero-SCs [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]. In the conjugated polymers, planar structured D-A copolymers composed of an electron-donating (D) unit and an electronaccepting (A) unit possess the advantages of high hole mobility and tunable electronic energy levels by selecting different D-unit and different A-unit with different side chains.…”

Section: Introductionmentioning

confidence: 99%

“…Lee et al [44] reported a D-A type copolymer HTM asy-PBTBDT with benzo[1,2-b:4,5:b0]dithiophene (BDT) as Dunits and benzothiadiazole (BT) as A-units, which achieved PCE of 18.3%. Kim et al [48] reported copolymer PTEG with introducing tetraethylene glycol (TEG) chains on the BT unit and the pero-SC with PTEG HTM achieved PCE of 19.8%. Cai et al [49] reported a series of carbazole and BTbased D-A copolymers, which have different lengths of alkoxy side chains on the BT unit and achieved the champion PCE of 19.1%.…”

Section: Introductionmentioning

confidence: 99%

Stable perovskite solar cells with efficiency of 22.6% via quinoxaline-based polymeric hole transport material

Zhu

Meng

et al. 2021

Sci. China Chem.

View full text Add to dashboard Cite

Poor stability of spiro-OMeTAD hole transport materials (HTMs) with dopant is a major obstacle for the commercialization of perovskite solar cells (pero-SCs). Herein, we demonstrate a series of quinoxaline-based D-A copolymers PBQ5, PBQ6 and PBQ10 as the dopant-free polymer HTMs for high performance pero-SCs. The D-A copolymers are composed of fluorothienyl benzodithiophene (BDTT) as D-unit, difluoroquinoxaline (DFQ) with different side chains as A-unit, and thiophene as π-bridge, where the side chains on the DFQ unit are bi-alkyl for PBQ5, bi-alkyl-fluorothienyl for PBQ6, and alkoxyl for PBQ10. All the three copolymers are adopted as the dopant-free HTM in the pero-SCs. The planar n-i-p structured pero-SCs based on (FAPbI 3 ) 0.98 (MAPbBr 3 ) 0.02 with PBQ6 HTM demonstrated the high power conversion efficiency (PCE) of 22.6% with V oc of 1.13 V and FF of 80.8%, which is benefitted from the suitable energy level and high hole mobility of PBQ6. The PCE of 22.6% is the highest efficiency reported in the n-i-p structured pero-SCs based on dopant-free D-A copolymer HTM. In addition, the pero-SCs show significantly enhanced ambient, thermal and light-soaking stability compared with the devices with traditional spiro-OMeTAD HTM.

show abstract

“…In recent years, organic–inorganic halide perovskites have attracted widespread attention and are considered to be promising photovoltaic (PV) materials because of their excellent photoelectric performance and extremely low material cost. At present, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has exceeded 23%. − However, poor long-term stability against ultraviolet radiation has limited their performance. Therefore, research on PSCs mainly focuses on the ways to simultaneously achieve high efficiency and long-term stability.…”

Section: Introductionmentioning

confidence: 99%

UV-Stable and Highly Efficient Perovskite Solar Cells by Employing Wide Band gap NaTaO₃ as an Electron-Transporting Layer

Shi

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Organic–inorganic halide perovskite solar cells (PSCs) still suffer from stability issues which are caused by possible erosions from moisture, ultraviolet (UV) light, heat, and so forth. An electron-transporting layer (ETL), that is, TiO2, is a key component for state-of-the-art PSCs. However, UV-caused desorption of O2– in TiO2 would accelerate the degradation of PSCs. Herein, we explored perovskite oxide, NaTaO3, for the first time as an alternative ETL in PSCs. NaTaO3 as an ETL can effectively avoid the damage from UV irradiation, inhibit the degradation of the perovskite layer, and improve the overall stability of the PSC. PSCs fabricated with NaTaO3 yielded a power conversion efficiency (PCE) of 21.07% with a retention of more than 80% of this initial PCE after 240 min UV irradiation in air while the reference device with a PCE of 20.16% can only retain about 53% of its initial PCE after the same testing condition. The developed stable perovskite oxide material of NaTaO3 provides the diversification of electron-selective contact for highly efficient and stable PSCs.

show abstract

Perovskite Solar Cells: Donor–Acceptor Type Dopant‐Free, Polymeric Hole Transport Material for Planar Perovskite Solar Cells (19.8%) (Adv. Energy Mater. 4/2018)

Cited by 16 publications

References 0 publications

Functionalized Thermoplastic Polyurethane as Hole Conductor for Quantum Dot-Sensitized Solar Cell

Functionalized Thermoplastic Polyurethane as Hole Conductor for Quantum Dot-Sensitized Solar Cell

Stable perovskite solar cells with efficiency of 22.6% via quinoxaline-based polymeric hole transport material

UV-Stable and Highly Efficient Perovskite Solar Cells by Employing Wide Band gap NaTaO₃ as an Electron-Transporting Layer

Contact Info

Product

Resources

About

Perovskite Solar Cells: Donor–Acceptor Type Dopant‐Free, Polymeric Hole Transport Material for Planar Perovskite Solar Cells (19.8%) (Adv. Energy Mater. 4/2018)

Cited by 16 publications

References 0 publications

Functionalized Thermoplastic Polyurethane as Hole Conductor for Quantum Dot-Sensitized Solar Cell

Functionalized Thermoplastic Polyurethane as Hole Conductor for Quantum Dot-Sensitized Solar Cell

Stable perovskite solar cells with efficiency of 22.6% via quinoxaline-based polymeric hole transport material

UV-Stable and Highly Efficient Perovskite Solar Cells by Employing Wide Band gap NaTaO3 as an Electron-Transporting Layer

Contact Info

Product

Resources

About

UV-Stable and Highly Efficient Perovskite Solar Cells by Employing Wide Band gap NaTaO₃ as an Electron-Transporting Layer