Power Supply Solution for IoT Sensing

Fujikura DSSCs
(Dye‐Sensitized Solar Cells)

Toward a world without need for battery replacement

Fujikura DSSCs (Dye‐Sensitized Solar Cells)

The cost and labor entailed in battery   replacement in sensor terminals is an important issue for IoT adoption

Streamlining and automation initiatives that utilize IoT sensing are being advanced in various situations all around us. While cheap, easy-to-install battery-powered sensor terminals are employed for proof of concept, when it comes to practical application, the cost and labor that accompany battery replacement become important issues in adoption.

Fujikura DSSCs   solve these problems

Fujikura DSSCs make battery-less sensor terminals a reality. The time and effort associated with battery replacement is becoming more noticeable as IoT sensing expands, its applications become more diverse, and the number of sensors terminals increases. DSSCs, which are able to generate power in all environments, can be employed in a wide array of situations.

We hope they will help you to address the challenges you face.

 Usage scenarios

As IoT terminals installation expands and their numbers increase, initial installation costs and post-adoption battery replacement costs are drastically reduced.

Sensor batteries

Other Applications

Fujikura DSSC  Features

IoT sensor terminals are characterized by utilization in every kind of location imaginable.
For this reason, any power source that aims to replace batteries must be able to generate power in any kind of location.
DSSCs are optimal devices for supplying power to IoT sensor terminals because in addition to being able to generate power over a wide range of lighting and temperature conditions, their incorporation into sensor terminals makes installation easy.

Capable of generating electricity anywhere in the living environment

Feature 1:
High power generation over a wide range of lighting conditions

Capable of generating electricity anywhere: in sunlight, in shade, in bad weather, indoors, etc.

Feature 2:
High power generation over a wide range of temperatures

Capable of supplying electricity from -30°C to +60°C, an even wider range than normal batteries can deliver

Sensor terminals with built in DSSCs are easy to install

Feature 3:
Can be installed without regard to the position of the light source

Since power can be generated from scattered light, there is no need to make sure the cells are oriented toward the light source

Feature 4:
It is okay for part of the DSSC to be in shadow

These cells avoid the problems that most multiple series solar cells can experience due to shadows

Feature 5:
Durable enough to be used both indoors and outdoors

While durability is said to be an issue with DSSCs, our cells are durable enough for long-term power supply without needing to worry about installation location

Feature :
Capable of generating electricity anywhere in the living environment

1

High power generation over a wide range of lighting conditions

Capable of generating electricity anywhere: in sunlight, shade, poor weather conditions, indoors, etc.
High power generation over a wide range of lighting conditions
2

High power generation over a wide range of temperatures

Capable of supplying electricity from -30°C to +60°C , an even wider range than normal batteries can deliver
High power generation over a wide range of temperatures

Feature : Terminals with built in DSSCs are easy to install

3

No need to consider the position of the light source

Since power can be generated from scattered light, there is no need to make sure the cells are oriented toward the light source
4

It is okay for part of the DSSC to be in shadow

These cells avoid the problems that multiple series solar cells can experience due to shadows

This video shows an experiment that places part of the DSSC in shadow -> There was almost no drop in power output like that which was observed for multiple series solar cells in the same experiment. (The figure at right shows power fluctuation)

5

Durable enough to be used both indoors and outdoors

While durability is said to be an issue with DSSCs, our cells are durable enough for long-term power supply without considering installation location
光照射試験
Test Cases
Temperature cycle test -40 to 90 ℃, 200 cycles
Temperature and humidity cycle test -40 to 85 ℃, 85%RH, 10 cycles
High-temperature high-humidity test 85 ℃, 85%RH, 1000 hrs
Light irradiation test AM 1.5G 1000W/㎡, 40℃, 500 hrs
Model test Terminal strength test, vibration/shock/drop test, overcurrent application test

 Product Specifications

Product name:
FDSC-FSC7FGC

External dimensions: 70.0 x 92.0 mm
Thickness dimension: 2.5 mm
FDSC-FSC7FGC
Unit Typical value Specification Notes
Maximum Operation Power Point (Pm) μW 340 >= 243 at White LED 200 lx,
Ambient temperature: 23℃
Operating Current (Iop) at 0.38 V μA 796 >= 569
Open Circuit Voltage (Voc) V 0.58 0.45 – 0.65

Product name:
FDSC-FSC4FGC

External dimensions: 56.0 x 112.0 mm
Thickness dimension: 2.5 mm
FDSC-FSC4FGC
Unit Typical value Specification Notes
Maximum Operation Power Point (Pm) μW 300 >= 214 at White LED 200 lx,
Ambient temperature: 23℃
Operating Current (Iop) at 0.38 V μA 776 >= 554
Open Circuit Voltage (Voc) V 0.50 0.45 – 0.65

Product name:
FDSC-FSC5FGC

External dimensions: 44.0 x 85.0 mm
Thickness dimension: 2.5 mm
FDSC-FSC5FGC
Unit Typical value Specification Notes
Maximum Operation Power Point (Pm) μW 165 >= 117 at White LED 200 lx,
Ambient temperature: 23℃
Operating Current (Iop) at 0.38 V μA 425 >= 304
Open Circuit Voltage (Voc) V 0.50 0.45 – 0.65

Product name:
FDSC-FSC12FGC

External dimensions: 23.9 x 62.3 mm
Thickness dimension: 2.5 mm
FDSC-FSC12FGC
Unit Typical value Specification Notes
Maximum Operation Power Point (Pm) μW 45 >= 32 at White LED 200 lx,
Ambient temperature: 23℃
Operating Current (Iop) at 0.38 V μA 117 >= 83
Open Circuit Voltage (Voc) V 0.50 0.45 – 0.65

Product name:
FDSC-FSC10FGC

External dimensions: 39.9 x 35.0 mm
Thickness dimension: 2.5 mm
FDSC-FSC10FGC
Unit Typical value Specification Notes
Maximum Operation Power Point (Pm) μW 42 >= 30 at White LED 200 lx,
Ambient temperature: 23℃
Operating Current (Iop) at 0.38 V μA 108 >= 77
Open Circuit Voltage (Voc) V 0.50 0.45 – 0.65

 Design support for switching to DSSC power supply

Combining a DSSC with a power supply IC or a power storage device makes it possible to eliminate the battery from a battery-powered IoT sensing terminal.
Using a recommended power supply IC suitable for the Fujikura DSSC enables stable electrical power to be supplied. See the table below for the amount of electrical energy that can be supplied.

Recommended power supply IC

Boost Converter

Manufacturer Device No.
Analog Devices ADP5090
ADP5091
LTC3105
Texas Instruments bq25504
bq25505
e-peas AEM10941

Step-up/Down Converter

Manufacturer Device No.
Analog Devices LTC3106
Texas Instruments bq25570

Estimated electrical energy supplied

(Model number: FDSC-FSC4FGC)
Dim indoor areas
200 lx
×12 hr/day
Bright indoor areas
1,000 lx
×12 hr/day
Dark shadows (outdoor)
5,000 lx
×12 hr/day
Light shadows (outdoor)
10,000lx
×12 hr/day
2.2 mWh/day 13.7 mWh/day 63.3 mWh/day 107.1 mWh/day

 Energy Balance Calculation (Rev.1)

Environments and working conditions of your IoT device may change which DSSC to be used.
Please use this simulation for easy and quick power design.
Please download the user’s manual in this site for details about how to use.

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